The Ft. Myers fall 17u event is an outstanding event to attend. I was last there in 2006. At that time, there were not many college scouts in attendance. The value at that time was largely towards building a player's Perfect Game database.
That being said, the last 2 years have seen a sea change in college recruiting. Kids are being scouted and given handshake deals earlier and earlier. I would imagine the Ft. Myers event will see steadily increasing scout attendance in coming years as a result.
Bear in mind that the 18u Jupiter event was originally positioned as the last major event before a player's early signing period (fall of senior year). Now, by the time you get to Jupiter, a large number of the top players have already committed and are just awaiting the signing period to get their paperwork and sign it. Jupiter is an event not to be missed, don't get me wrong, but at times I wonder if it might have to get moved to September at some point in the future, to keep it more essential to the recruiting time table that is actually in use. There will always be the pro scouts, of course, but several coaches I talked to at Jupiter last fall had already hit their quotas of 2008's and were there primarily to get an advance look at the 2009's in attendance. With that in mind, you can see how the Ft. Myers event might come to take on increasing significance.
One other caveat. WWBA events generally are very pitcher oriented. If you are a pitcher, you can go throw one 3-inning outing and accomplish all you came to accomplish. If on the other hand you are an offensive player, if you just come without a plan and you hope someone will notice you, it can be hard unless you are really pounding the ball that particular weekend.
The best use of these tournaments is for the player to keep in regular communication with the recruiting coaches for the programs of greatest interest to him about who he's playing for and when and where. Then hopefully those guys will be at the game not just looking for whoever catches their eye, but specifically to see you, and to see how you hold up against the best competition opportunity there is for a high school player.
That advice goes for both pitchers and hitters, but is particularly important for the non-pitcher.