It looks like you're new here. If you want to get involved, click one of these buttons!
I'm utter confused as to why people want it in a virtual world. I ride a CBR600RR and have a spare CBR125R to play with. I decided to practice stunting on the CBR125R earlier in the summer with a few friends. The difficulty involved with popping a wheelie, maintaining a stoppie, doing back flips off the bike while it's running, and other incredibly eye pleasing tricks are FAR BEYOND what the virtual environment can or will ever provide you, but here's the most important part: PENALTY OF FAILURE.
You want real penalty? Consider this: A friend of mine shattered his wrist doing a failed stoppie, my bike flipped onto me when I overestimated how much brake power I needed to do a stoppie. In the end, I'm physically hurt, and my partner, the bike, needed mass repairs. In the end, I learned how to control my bike further but there was physical pain, and mental pain involved.
Reread that and explain to me why you want this in an MMO? You can do the above with cars, sports, paintball, and just about everything in real life. Do you lack the ability to? Unless you're handicapped, which then I'd understand, just why do you want to "challenge" yourself with time sinks and other. How about in WoW for every time you get hit by a fireball you burn yourself, every time you get stabbed you smack yourself with a stick, there you go, penalities.