Damian Conway (who's tutorial was just described) is an excellent speaker. I've never heard him give a presentation I didn't really enjoy. While he's in the US, one of his stops is Provo Utah and he'll be speaking to the Provo Linux User's Group on Wed Aug 10 at 6:30 pm in UVSC, Room CS 404. Not only that, but O'Reilly will be sending some books out to be given away. I wish I could be there, but I'll be on vacation.