RMS skewers Sun's patent grant announcement.

So what has really happened here? Reading the announcement clearly, I think that it doesn't announce anything at all. It simply describes, in a different and grandiose way, the previously announced release of the Solaris source code as free software under Sun's idiosyncratic license, the CDDL. Outside Solaris, few or no free software packages use that license–and Sun has not said it won't sue us for implementing the same techniques in our own free software.

Perhaps Sun will eventually give substance to its words, and make this step a real one like IBM's. Perhaps some other large companies will take similar steps. Would this make free software safe from the danger of software patents? Would the problem of software patents be solved? Not on your life. Neither one.