Please forgive if a redundant post, but is MS Streets and Trips discontinued? When questioned, The MS reps at the 2011 LAS CES had hinted to this, saying that bing maps will now cover it. . .called the MS store for 2011 Streets and Trips info and they were unable to answer. . . . . Historically, updated versions of MS Streets and Trips have been released in/around October.
My guess would be that the MS people present at CES were not the ones close to the product group working on mapping products. The new S&T has been delayed, but is in the works. MS never officially announces ETA of unreleased S&T, but here is a blog posts that updates occasionally with "rumors" that may be of interest.