From what I heard from the Yahoo reps at the show the new version of Yahoo Go should be dropping today. So far I just checked and it has not yet been released but the mobile website is promising by the end of the day. I am just not sure what time zone they are banking that statement on because it is 10:30pm in Vegas.
The new version brings better email and news functionality to the app. They also add satellite map options and live traffic that have been in Google Maps for ages. There are also supposed to be some speed updates. I just hope the new version justifies them bumping the already large file size up from 855kb to an even larger 961kb.