updated 12:15 pm EST, Fri February 25, 2011
Service moving rapidly towards new incarnation
MobileMe is indeed only available from Apple online, a worker at an Apple Store Genius Bar has confirmed. The person shares a screenshot from Apple's Sales Web interface, which prominently displays a "now exclusively available online" tagline. The website also explicitly mentions the removal of boxed copies from Apple Stores, but not the elimination of a bundle option for online orders.
Apple moreover appears to have removed any option of actually paying for MobileMe. While people can sign up for a free 60-day trial at Apple's website, there is no choice to pay for either an Individual or Family Pack account. These would normally cost $99 or $149, respectively.
Apple is believed to be converting MobileMe into a free service, one with greatly expanded functions. Chief among these is use as a media locker, allowing people to access their music, photos and/or video on an iOS device without having to sync it. The upgraded MobileMe may be unveiled next week at a special press event.