Generation III Internal Engine - Gunk on throttle body

I picked up a '00 trans am about a month ago. 2 owner car, all stock except for a drop in k&n filter. So acouple days ago I got a slp lid and when I removed the the old lid I saw there was gunk all over the inside of the throttle body :confused. Im guessing its from the oil from the filter but idk how long that filters been on the car. Any one have a similar experience?

Also, I forgot to snap a pic of it, but you shouldve seen the how much debris was on the maf sensor screen! After the lid and unclogging the maf screen the car felt abit less sluggish ;)

http://i2.photobucket.com/albums/y10/xboddahx/IMG_0931.jpg
http://i2.photobucket.com/albums/y10/xboddahx/IMG_0929.jpg

Take the TB off and clean it up with brake cleaner and an old toothbrush.