I do!!!! Check Timdog Wheelie. Ive been practicing Sitdown wheelies as of late as well and am getting good with the rear brake and staying in the balance point. I start them as a standup then I just sit down mid wheelie. Im getting better and better. Very fun stuff! Im such a showoff :)
My current goal is to wheelie for at least 2 miles. Also would like to practice more slow controlled stuff like circles and 12oclocks and such. Maybe someday I'll get good. Just dont really want to crash my beautiful bike.