Here's an interesting article. The Ubuntu deal may have been announced first, but Dell seems to be investing deeper into Linux. On Sunday, Dell signed a deal with Microsoft and Novell to offer Enterprise Suse Linux on servers.
The full story by Elizabeth M. Gillespie of the Associated Press is here: http://biz.yahoo.com/ap/070507/dell_microsoft_novell.html?.v=8
While Ubuntu seems to be Dell's choice for the desktop market, Suse will take the server side.
I am curious to see how this shakes out. Comments are welcome here for this story!