You are in the same boat I was in about 3 months ago. My employers came to me about SQl. The best thing I can recommend for you is to actually sit in on a Microsoft Course. There are SQL administration courses Microsoft offers so check the nearest Private or Corporate College that offers Microsoft Official Courses. I also picked up some books on the matter. The Exam Cram books are usually very good desktop reference material when you are stuck.
www.examcram.com. There is also some websites you can check out such as
www.cramsession.com,www.leapit.com and you may be able to even get a computer based training course at
www.smartforce.com. Good Luck.