I had been using 3 for sometime... it's still very buggy and even on the forums they will tell you it's an Alpha/Beta.... DONT USE IT. They also tell you that it's for developers and shiz...
I recently switched back to winamp 2.81 cause I was sick of the skipping and problems with 3. It sucks.
Yes, winamp 3 is what they show on the main page... but winamp 2.xx is still the "Main" product they recommend.