Welcome to the forum phdmam, I had the same thought, but if you use the search option and type in "30 tooth", I'm sure you'll find MANY postings on this.. Not trying to be a turd or anything, but I have also done this. I have also bought a 30 tooth sprocket and I love it too. And for anyone who hasn't yet, when you replace your chain, make sure it has 108 links or more... I got my new chain from e-bay the other day and finally had a chance to put it on today with the help of my girl.
Long story short, if I hadn't put the 30 tooth on, I would still be swearing, for my new chain only had 106 links. I had to pull the wheel all the way back with the old chain, and now I had to push it all the way forward, re-move the brake arm to the origional position, and completely re-align the rear wheel.. UGH!!!
Anyway, phdmam if you ever need anything, thats what we're here for and if all else fails and no one is getting back to ya, just use the search.
In between bikes right now.