Being in IT, I've learnt alot. First off, I had a ton of certs before I was hired. MCSE NT4.0, MCP+I, A+
When I got hired as a network technician, all those things I learnt beforehand, I didn't use. Now that I'm 'in the field', I've learned that experience is the utmost best thing to use as a credential but also that whatever cert I will train for next, will be towards what Im doing now. Theres no need to get an MCSE in Vista just because it's an excellent thing to have. I would rather take the CCNA route and learn alot with what Im doing now.
I guess what Im saying is; get into your field, decipher whats best for you and move forward. Dont take a cert class 'just to have it' (I am in no way implying these are your intentions, but I see it everyday). Make sure it applies to your everyday duties and you'll understand more on why your in such an incredible volatile field and that's when you become a true professional at what you do
Not only will you have the book knowledge, but all the quirky stuff they never write about in books, you'll have that too!
Hope that helps. Good Luck!