Take a look at the technical characteristics :

Hardware	ARM7100 central advanced RISC processor (18 MHz)
Software	32-bit EPOC32 multitasking operating system with EIKON advanced graphical user interface. User interface supports desktop metaphor with long (VFAT file system) filenames for documents. Built-in applications include advanced database, time management, calculator, time/world clock, word processor, spreadsheet, sketch/draw tool, VT100 communications, audio software, spell checker, OPL32 programming language.
Input	53 key full-travel laptop-style keyboard Pen stylus (stored internally) Integral touchscreen Touch buttons beneath and alongside screen.
Memory	4Mb or 8Mb internal RAM memory (i.e. 8Mb = 2000 pages of text; 40,000 appointments; 20,000 database entries; or 30 minutes of digital audio). Compact Flash card slot (2Mb - 30Mb).
Audio	Digital audio system with real-time compression Integral speaker and microphone External record, play/stop, rewind buttons Audio software built-in.
Connectivity	High-speed RS232 serial port (up to 115.2Kbps) Built-in VT100 terminal emulator IrDA-compliant infrared port provides file-transfer to PCs, printers & other Series 5 palmtops. Psion Explorer software CDROM & serial cable included (provides file- transfer, backup facilities and connectivity to Microsoft, Lotus & Corel office suites).
Power	2 x AA batteries (up to 35 hours life) External AC adapter (6V DC) 2032 3V lithium backup cell.
Display	5.25˛ x 2.0˛ (active area) backlit LCD touchscreen Full VGA-width (640 x 240 pixel) resolution screen - no need to scroll left or right 16 grayscales.
Dimensions	170x90x23mm
Weight	354g including batteries

Source :

What people said about the Serie 5 :

	"The Series 5, although not the end goal of Psion's new developments, is a superb addition to the family. It has ensured that Psion will maintain its domination of the market over the next few years through a design which is innovative and addresses a broad range of problems affecting hand held computers. It is considerably more advanced than any other device available at the moment and EPOC 32 is a stunningly impressive platform upon which to base future machines. In the words of Dr David Potter, Chairman of Psion Plc, Psion are once again light years ahead of the competition."
	... ``I am Psion. I am better by far as a personal digital assistant than those boxes called Windows CE.'' ... In Psion, you do your work in applications designed by Psion rather than by Microsoft. You have a tool that does just about everything that Word and Excel do. Afterward, those Microsoft programs and just about any other Windows software can read the Psion's output. But Psion does its stuff in markedly different ways from the ho-hum Microsoft mold we are coming to know all too well. This box from Britain thus arrives as a bit of fresh air from abroad, good enough to challenge mighty Microsoft in its own back yard.
	...In many ways, the Psion Series 5, at $599 for a four-megabyte version and $699 for the eight-megabyte model, is what the handhelds using Microsoft's Windows CE software should have been. Unlike CE, its main screen doesn't look anything like Windows, but it's easy to read even in fairly dim light...
	...At the heart of the Series 5 is a fast RISC processor from ARM, running Psion s own 32-bit Windows-like operating system that supports Java and C++. A Web browser, e-mail client and fax software will be available later this year at no cost... The UK company could have another world-beater on its hands.
	Appearance can be deceiving. Psion's next-generation personal digital assistant, the 32-bit Series 5, is a light and debonair Fred Astaire on the outside, a muscular and multifaceted Arnold Schwarzenegger inside.

From :

The PSION Quarters :

	PSION UK		PSION Inc
	EPOC World		Psion Software PLC

Psion Serie 5 related sites that worth a click :

	This is a free palmtop net magazine. It speaks about all palmtop computers and sometime about the Psion Serie 5. The only thing that I regret is the importance given to the Windows CE...
	One of the top 3 sites for the Psion Serie 5. You will find some pictures, all the news, some reviews, some links to all the applications that have been developed and many more.
	All that you need to find about programming resources for the psion. Links to the different SDKs, source code, shareware registration guides...
Palmtop	This is the site of one of the largest Psion developer. Most of their releases are commercial products, but they also produced some excellent freewares, such as the spectrum emulator and the doom wad file interpretor.
	One other "Top 3 Site", some good shareware programs and useful infos.
Total S5	The last one in the top 3 family. Very exhaustive, very well organized. Congratulations Adrian!
Marco Hankel's page	The main page is about the Serie 3 but this is a very large list of links. So if you want to try other sites that these listed here, just take a look to this page.
	This is a site for a swiss company which is focused on Psion computing. So if you have any question, problem, or simply if you are curious... Attention : the main part is written in French.

More to come... be patient...