This is a cool little Web site. Being that I’m well over 15 years removed from 7th-grade grammar instruction, I often find myself questioning sentence construction, word choice, etc. (How many errors were in that last sentence? Sheesh. I couldn’t even tell you anymore.) Grammer Cop has a helpful reference section of questions submitted by users, and if you don’t see what you need, you can just ask!

http://grammercop.com/joomla/index.php