An anonymous source to TUAW claims that .Mac will see a refresh with the release of iPhone 2.0 which is expected at WWDC.
While the site claims .Mac will see a "complete revamp", the details given indicate a less dramatic enhancement-related event, with the main features being exchange-like over-the-air syncing of calendars, contacts, and email via .Mac for iPhone, and .Mac syncing on Windows.
A reminder to readers that anonymous tips, regardless of the publishing entity, should always be regarded with due suspicion.