Bluetooth missing?

I recently discovered after installing the new Snow Leopard OS that I did not have a bluetooth option under my system preferences. I own a mid 2008 Macbook Pro (pre-unibody, more info below) and I know that I've used it before. I recently took my computer in to be repaired by Apple because the keyboard and trackpad were inconsistently responsive, and to fix it they simply replaced the entire top panel (with the keyboard and trackpad). I have also checked under the system profiler and it says that there is no information available for my bluetooth...what exactly does this mean? Did they forget to reinstall it? or what? Any help would be appreciated here because I just have no clue

Thanks in advance...