Sadly, Google currently allows only one Google calendar to be synced with a Windows Phone 7 device. This is not the case for Android and iPhone. However, we can trick Google into allowing multiple calendars to be synced on Windows Phone 7 running Mango.
Message to Google: Please do not discriminate against Windows Phone 7!
I see a lot of that going on … g+ won't let you log onto the mobile site because google profiles explicitly locks out any IE < v8
Really interesting news. This things are new…