Bif Bang Pow finally released the full set, after offering a Sheldon exclusive at a Comic-Con so long ago, I can't remember. The figures are decent - some of the sculpting of the glasses seems off (but those have to be pretty hard to do right) and the paint applications aren't the greatest. Originally, it was rumored these were to have elbow and knee joints but all the figures are 5POA.
Another comic-con exclusive was the Sheldon - Stuart 2 Pack. Stewart owns the comic book shop where the dudes hang out. Each card folds out to be a piece of iconic scenery from the show, mostly their apartments. I'll take photos of those some other time. In total, six Sheldon's have been released with different shirts, most of them of DC super heroes (Batman, Superman, Hawkman, Flash).
Rumors of additional series including Star Trek costumes are in the works. Hopefully, sales will help bring those to fruition.
Sheldon and Stuart 2 Pack
Attack of the Clones
or One Sheldon is Enough