The Anakin set is the only set that I've seen more than once, and even it doesn't show up all that often in my area.
Wal-Mart is the only place that has gotten the Anakin set on a semi-regular basis, and it's one of those "one day and gone" items to say the least. Target got one case of the Anakin set and has never restocked (par for the Target course around here) Evolutions at all. K-Mart got the one case of Anakins back at the very beginning and since then nothing at all.
TRU.com is pretty much useless at this point for preordering anything from the SW line, I think. After my Unleashed fiasco and Obi-Wan JSF debacle with them, and the fact that the Anakin set is still "not yet released" after two months or so at retail, I'm not going to be preordering anything from them anytime soon.
Has there been any recent information/updates on the variant Clone Evolutions set (boxed photos, overseas "leaks", release timetables, etc)?