This is so unexpected!
First of all, I thought ActiveState, the company that sets the standard in open-source languages for Windows, were bigger and/or they were subsidized by Microsoft. It seemed logical that they would buy someone like Sophos. So-who?, I only heard of Symantec, McAfee, Panda, BitDefender and RAV.
I’m really curious how the Unix users at Microsoft Research will use ActivePerl, now that it seems that it will get another price. Where is the trash can that will get ActivePerl for Visual Studio .NET? Sophos is not a big R& D investor, they were only after some counter-spam tools.