With April nearly over, it's high time Acer came clean on when exactly its promised Ice Cream Sandwich upgrade for the A100 and A500 would land. Today the company did just that, revealing that US owners of either tablet can opt-in for their frozen makeovers starting on the 27th. Bad news if you're rocking AT&T's variant of the latter though, as the listing on the company's support page for the A501 says "no update planned." Those not tied Ma Bell can expect Acer's skin -- including that ring launcher -- grafted onto Google's latest, much like the A200's ICS upgrade back in February. Already pumped? Go ahead and bookmark that source link. Do it, we won't judge.