VS 2005 Spell Checker Add-In
I found this neat, free, add-in on
www.dotnet2themax.com that allows you to spell check your comments and such.
http://www.dotnet2themax.com/ShowContent.aspx?ID=ded748ac-f681-4976-9623-71f5f3e3ea8f. There is a VS 2003 and VS 2005 version available.