Pretty sure there is a specific application required to declare and there should be a deadline to withdraw, and that's above and beyond agent issues. If I remember right, it is possible to declare/withdraw without an agent, but it wouldn't make sense to withdraw once you've hired one because you are NCAA ineligible. Here's a link to the 2005 NFL calendar where the entry deadline was the 15th and the deadline to withdraw an application was Jan 19th.http://www.gbnreport.com/footballcalendar.html
Correct. This guy won't be drafted (and shouldn't). He's a bit more athletic than Orton, has decent arm strength, but his accuracy and leadership are sub-par. He might get a practice squad gig and hope to continue developing. He really never had the full attention of the Boiler coaching staff, so who knows, maybe he's got more raw ability than has been shown.
There was an article on scout.com that talked a little about why the influx of underclassmen declaring. Supposedly, there is a rumor out there that owners will be voting on a rookie salary cap figure or something. I kind of skimmed over it, but will see if I can find it again.