Linux distributor Xandros is licensing messaging protocols from Microsoft as part of an expansion of the partnership the two companies forged in June.

Novell, Xandros and Linspire have signed well publicized agreements with Microsoft. Rumors on the Web have hinted that Mandriva might be next on the list. Mandriva believes in interoperability, which must be based on open standards, like ODF. They also believe that software patent threats are just FUD. So no deal with Microsoft from Mandriva.

Xandros CEO Andreas Typaldos said Thursday his company did not agree that its Linux distribution violates any Microsoft patents nor did the software giant ask Xandros to do so as part of the patent cross-licensing deal the two signed Monday.

Microsoft Corp. said Monday it will share technology with Linux distributor Xandros Inc., the latest in a string of deals meant to help the patent-protected Windows operating system work more smoothly with open-source programs.

On the back of defending the agreement this week, Novell did as promised and published details of its landmark November 2006 Linux partnership agreements with Microsoft.

Red Hat, the largest Linux vendor, and Ubuntu-maker Canonical have both rejected calls from Microsoft to forge a deal similar to the one the Redmond giant signed with Linux distributors Novell, Xandros, and Linspire.

The trade press reported a lot of rumors this past week about the chances for a patent protection pact between Red Hat and Microsoft similar to the agreements Microsoft negotiated with Novell, Xandros, and Linspire. Red Hat doesn't appear to be interested in the least. Here's why.

Microsoft's partnership with Novell got a lot of people in the open-source community fired up. Since then, Microsoft's Linux deals with Linspire and Xandros have just thrown gasoline on the fire. Now, it appears that Red Hat, the leading Linux company and the most vocal opponent to Microsoft wheeling and dealing, tried to make its own deal with Microsoft before the Novell one was released.

Over two years ago, Microsoft and Novell signed an interoperability deal. Part of this agreement was a patent deal that suggested that Linux infringed on Microsoft's IP. Since then, Microsoft has signed a number more of these deals with various companies, but the Novell one is still the most famous.