Hear, hear...
I was also quite saddened by that sudden action. If you browse the Devel forum at Slackware, you will see the amount of disruption it has caused in the lives of the Slackware developers.
That's an example of a traditional-style corporation "not quite getting it" about the purpose of open source work. I'm sure they just automatically assumed that enything that would strengthen Slackware would weaken FreeBSD, since the two are in "competition".
If they kept both and managed to really work on the interoperability, then they would have two truly stronger products.