There is not much out there yet, but six new leagues plan on starting in 1999. Here is what I have come across so far. For more information on these leagues, see the article I wrote called Are You Ready For Some Football?.
The Regional Football League. This league is a spring league that is slated to start in the spring of 1999. The FanOwnership Football League
Not much out on this yet, and most of the information is dated. This league is run by the Dixon family in New Orleans and was scheduled to start this June but has been pushed back to 1999. Here are some articles on this league.
I am amazed the United States Football League did not survive. It had so many big stars. This is probably the best USFL page I have found. This is another very good one.
Remember the Professional Spring Football League? Probably not since it folded during the first training camp. Here is a page devoted to the PSFL.
If we jump in the wayback machine, we will find the World Football League. It folded after the second season. Here's a good WFL site.