Infinite Loop alum David Chartier alerted us this morning that his MobileMe account type had changed from "Family Pack" to "Full Member." Turns out that several MobileMe subscribers have reported having their account type change, fueling speculation that Apple will announce tiers to MobileMe subscriptions next week during WWDC.

Previously, MobileMe account types were either "Trial," "Individual," or "Family Pack." Without notice, numerous MobileMe users had their accounts changed overnight to "Full Member." While rumors have suggested that Apple may drop the $99 price to better compete with Google's services, Mac Observer speculates that Apple may instead offer multiple tiers of service at different prices, with current $99 subscribers getting all MobileMe features. New subscribers would presumably be able to choose a cheaper option with fewer features.

In fact, both of those things might happen. With its recent acquisition of Quattro Wireless, Apple could offer a free, ad-supported version of MobileMe along with one or more paid tiers. Google's cloud services, including Gmail, online storage, and mobile syncing, are all free and ad-supported.

At this point, however, this is all speculation, as Apple did not respond to our request for comment as of publication time.