Cingular seem to have released their AKU2.2 ROM, but it looks like they messed up.

The new ROM has version number 2.25.11.1 WWE and is dated May 11th 2006. However, upon downloading the file it turns out to be only 39 Meg, and according to this comment in the forum and these comments on the XDA Developers Forum, the file does not work:

It's a corrupted file. I tried downloading it last night and again today just to confirm.. Doesn't seem to be able to get past a certain point before it errors out stating that it's corrupted.

...and...

It does appear to be corrupted. It only shows 39MB when it should be 51MB. Strange.

...and finaly...

This is about par for cingular

It looks like the new ROM will be available shortly, just not yet...