Hey Nick:
Good for You!
Autocross is great fun, my daughter is really into it but I have to be very quiet when I tell you she uses a Neon... shhhh, someone may hear and remove my access to the forum!
There's a guy out here (Phoenix, Arizona) Autocrossing a VW, I haven't had a chance to talk to him yet, but I think he has some serious horsepower. The car just shudders when he drops the clutch and he gets off the line pretty quick. Lots of Euro's do Autocross events in beetles so the potential is there.
I'm re-considering my 1973 Super Beetle's future, maybe it would be a fun auto-X car! I haven't done one since 1980, but the need is still there to go fast!
Have fun
DaveM