Nope no IS so be sure you won't regret before buying, great price otherwise.
AFAICS the A570IS, A580 and A590IS are all as similar as would make no difference to near anyone except for the Image Stability which if it works well is worth a few extra quid.
Comparison here
I bought the A590IS last month for under £75 from Argos. It was a similar price at Amazon too so you
may not have to hold out for too long for those prices to appear again.
Worth knowing about the
CHDK modified software for the more technically minded.