SharePoint 2010 Sandbox Solutions are Bad
http://www.elumenotion.com/Blog/Lists/Posts/Post.aspx?ID=105

Sandbox Solutions are Good
http://blah.winsmarts.com/2010-1-Sandbox_solutions_are_pretty_damn_good.aspx

Followup

http://www.elumenotion.com/Blog/Lists/Posts/Post.aspx?ID=108