A column at TheStreet.com talks about Microsoft going after the embedded market and finding Linux and Palm in the way.
"Linux has been a bugaboo and boon to Microsoft
for several years. On the one hand, the
open-system movement has threatened Microsoft
as techies flocked to the technology, which they
hoped would break the monopolist's back. On the
other hand, Linux was one way Microsoft could
argue that it had legitimate competition. Linux, in
other words, simultaneously was a threat and an
antitrust suit negotiating point."