Again AT&T from AT&Tfacebook wrote that the ICS update will be released in the coming months. You can read all about it here:
http://www.att.com/gen/press-room?pid=22620&cdvn=news&newsarticleid=34101&mapcode=consumer
I checked the URL n saw that the announcement was announced on March 22, 2012. There written HTC Vivid™ will be the first U.S. smartphone to receive Ice Cream Sandwich as an update and the first to be issued by a wireless carrier. It will be followed by several other AT&T devices in the coming months. Now its June 2012. Coming months is not minimum satisfactory date or time frame
Thanx in Advance