Visual Studio 08 Spell Check Addin?

The plugin from Microsoft's Mikhail Arkhipov does HTML and Comments, I don't believe it does C# strings, though. I use the Agent Smith plugin for ReSharper for that.

Visual Assist X. Spell checks your comments and a whole lot more.

http://www.wholetomato.com/

I use this to check Comments and string spell checker. It's from component one http://www.componentone.com/SuperProducts/IntelliSpell/. It's very fast and there is a free community version.

The source code for Spelly is available, it would be pretty easy to update it for vs2008.