I got this idea from a Strat-O-Matic forum, but it is a real baseball brain teaser:

Your goal is to put together the best 25-man roster from the FA's that hit the market Sunday. Pretend you have been awarded an expansion team and you need to fill the 25-man roster strictly from the FA list. Try to stay under $80MM/yr in "expected 2007 salary" if possible.

==> Since this blog is lively, I posted it on a new blog location... check it out, it's fun and challenging!
(http://bobbymacbaseball.blogspot.com/index.html)

P.S. The other site has a complete list of the guys who declared FA on Sunday.