Just like the smaller sibling in the A100 it appears that Acer has flipped the switch and is rolling out the update to Android 4.0.3 Ice Cream Sandwich for their Tegra 2 powered Iconia Tab A500 too. The update was originally stated to start on Friday, April 27th but it apparently is available now and rolling out to users in the US and Canada.
Acer originally announced the updates for their tablets, then delayed them until April stating the 27th was the day. The Ice Cream Sandwich were actually leaked back in February but weren't anywhere near final builds. The official update from Acer themselves is available today so get to checking.
We are hearing a few reports that the ICS update for the A100 has made a few apps not work the same, and some apps are crashing but nothing specific was mentioned. Users should be greeted with a small update after the ICS update too, that apparently fixes a small bug. As usual you can wait for the update or pull it to your tablet right this minute by going to menu > settings > about tablet and check for updates to enjoy the frozen Ice Cream Sandwich tonight. Let us know how it goes and if you experience any issues.
-- Thanks to everyone who sent this in!