Sun Microsystems may be warming up to the idea of selling Microsoft"s Windows operating system on its servers. Tom Goguen, vice president of operating platform marketing for Sun, said this week that while Sun currently has no definite plan to strike a deal with Microsoft to sell Windows, the vendor will consider it if customers and partners think it"s a good idea. "It depends on what our customers tell us to do," Goguen said. "If we find enough customers that say we want you to have that type of relationship with Microsoft, [we will]."