It is overdramatized but I have to point one thing out. MS can't sue linux. Period. Asside from bad PR there is one major problem: MS is already accused of monopolising the market. Thus suing linux providers will only hurt their cause. Instead it is better if other companies do it. Or maybe they do/don't care about it but they just want to rid themselves of these patents so they can claim "we are letting linux die because MS makes a superior product, not because we are trying to kill of linux with legal red-tape".
It may have been coencidence that linux got the stuff, it may be that AST made a profit buying and re-selling. In any case while MS might be evil we definately got another kind of evil sitting on the other fence keeping MS in check.
Nothing to see here, move along.