Breaking my long forum silence to chip in a little extra information. I was on Badspot's Block Party many years ago and asked where After School Special is from, and he told me it's from a royalty free CD he got in 1997. This CD is from 1998. There are two explanations:
1. Badspot remembered the wrong year. It happens.
2. Badspot really did get that CD in 1997, possibly one that had been printed 1996 or earlier, and this 1998 CD is a later version of that one. Thus, that CD would be the true source of many of Blockland's sounds and music, and likely that one 1996 song that samples Ambient Deep, too.