I don't consider wheezy stable for ED, as it:
a) requires chromium from squeeze, as wheezy one segfaults on armel
b) have problems with glibc. So far, it manifested itself only by crashing gparted, but have potential for other problems
c) GIMP from Wheezy crashes on ED, when trying to change font settings, while using "insert text" tool. Reasons are unknown, no one tested if it is ED problem, or related to whole armel, like chromium problem.

As for "which squeeze image is most recent", I have no idea. I'm using my one (squeeze-img-estel, or something like that), upgraded to latest.

/Estel