I have no problem sniffing wireless traffic with Wireshark under the latest Ubuntu 11.04 Natty. Didn't take 2 days to get it done either.
Right, but it all depends on what hardware you have. And I was trying to do it under a version of ubuntu that was from 3 years ago—whatever version that was. I want to say 8 or 9...possibly 10 though. I had to go through a coupld different versions to get it to install properly so don’t remember which one I settled on.
Oh and my laptops are replaced every 18 months and are typically higher end so the drivers often don’t exist for Ubuntu until I’m about ready to upgrade to a new laptop.