Miguel de Icaza (Mr. Mono) has written an excellent piece on ORCL suing GOOG over Android/Dalvik.
Oracle, as Sun, extracted $1.6bn from MSFT, and $900m of this was for patents. So we can safely assume that Microsoft's .NET implementation is covered by this deal.
Now Miguel and Mono folk will be crowing about how wonderful the Microsoft Patent Licence Grant is (and it is a generous gift). However, one small point: Mono is also likely to be in breach of Oracle's patents, but Microsoft do not have the rights to confer these rights to Mono.
So Mono folks - you're just as likely to get a visit from Oracle as Google, or at least you would be, if NOVL had a Market Cap 50-100 times the size of it's current woeful state.