SAP needs an OS? Really?
Not so sure about that. SAP can currently garner support from IBM, hp, Microsoft and the Linux crowd by offering their software with equal gusto on all fronts. If it was to buy Novell it would be seen as giving preference to Linux (SLES) and the other OS vendors would suspect SAP would start to give Linux preference over others. That might mean SAP starts finding support from other sources starting to be a bit hedged. And to defend SAP's marketshare against Oracle, SAP will need all the friends it can get. Sure, Microsoft and IBM both make competing products, and the Linux crowd are also pushing "free" alternatives, but at the moment they all see Oracle as an enemy given Oracle's new-found love of SPARC Slowaris, and the enemy of my enemy is always my friend in the software market. Staying OS agnostic is probably the smarter bet for SAP.
IBM, on the other hand, has a long relationship with Novell, has a reason to go up against Microsoft, and has the money to spare. I think far too much of hp's revenues are linked to being Microsoft's BFFL, and they're still sorting out the EDS mess. Any move by Microsoft to buy Novell would have the EU competition authorities going ape, let alone the US one, and probably the same for an Oracle purchase attempt. I see IBM