MacRumors reports that when MobileMe comes back from downtime at midnight it will return with several enhancements. Arguably the biggest will be the new mail interface coming out of beta. This new mail site will also bring push mail delivery to customers checking their e-mail on the web.
Another new feature will be the expansion of the Find my iPhone service to the App Store. Apple recently opened up Find my iPhone to the iOS browser, and now there will be a universal application. This universal application is built to work across all devices, without pixel doubling on the iPad, and will be a much quicker gateway to locating your lost device.
Another enhancement will be a redesign of the MobileMe toolbar. The toolbar pictured above will become obsolete, and will be replaced with a single application-switching button.