There has still been no response from Atari. I post merely to inform you that we haven't given up just yet.
Things are looking grim in regards to getting a patch for the game, but a couple of Atari forum members have found some things that seem to improve gameplay to some extent. In addition to this, some interesting, to say the least, internet port usage has been uncovered by forum members. There is speculation that this is tied to the reason that online performance is so poor.
Forum members End_of_All and Joh have handled most of this, so be on the look out for their posts (in the last few pages of the lengthy tread). You can view the thread here: http://www.ataricommunity.com/forums/showthread.php?t=625093
Aside from this, many forum members, myself included, have decided to give Atari until the end of the work week to give us a response (we have literally heard nothing). If this does not happen, many of us will be returning our games to used game retailers out of our disgust for the company's customer service.
Here's to hoping for the best.