Today, Microsoft announced that it is acquiring Sybari. This comes hard on the heels of their buying Giant, and GeCAD.
It's an interesting move, nevertheless. Sybari Antigen seems to be a product line that's well respected by those who's opinions matter most: it's customers.
I expect more consolidation during 2005, especially in the anti-spam market. There are too many private anti-spam vendors, some of whom are becoming insufficiently capitalized: either in terms of VC funds, or in terms of intellectual property.