Google has announced a couple of important and welcomed changes to their calendar and email experience for Windows Phone 7.5 users. The two changes are server-side search and multiple calendar support. Depending on the user one is more important than the other.
Server side search-Allows users to search for emails on their gmail account that is older than the 30 days that emails remain on their Windows Phone. This should result in a huge increase in productivity and lessen the headache of inconveniently having to wait to getting home to look up an older email.
Multiple Google Calendar Support-Now you can have access and view appointments and schedules from multiple Google calendars simultaneously. Great for those that have built their life around this particular Google service.
Source: Paul Thurrott’s Supersite for Windows