Fingerjig is a fun little typing game that tests your accuracy and speed for randomly selected words (each level tests a different typing skill). I could hit a little above 80 wpm on the long words, but slowed down to a painful 10 wpm on the single letters. I suggest you turn off your speakers though, the sound is really annoying.
Link to Fingerjig
By the end of the semester, we were all typing above 80 wpm (one girl could sustain ~150 for easier transcriptions, I typed 100-120). Best and worst teacher ever.