WPCentral posted the latest rumors on Windows Phone 7.5 Mango

Eck, there's just rumor upon rumor tonight. This one is from MS_Nerd again, who at least has a solid track record. In a few new tweets, he drops some bombshells:
1. 3 "new" hardware partners for Windows Phone to be announced
2. The full Mango wave will launch with ff-cams (front-facing cameras)
3. Zune Pass will slowly be merged with Xbox Live Gold, adding more 3rd-party content to the subscription (like ESPN).

  'Mango' devices to launch with Front-facing cameras, 3 new hardware partners to be announced (rumor)