GFI recently released their own Anti Virus software which didnt get great reviews.But that is all about to change as when I was working with Netforce we began using Sunbelt Vipre and it is my favorite AV program and it is maturing with release of version 4. It has to have the best GUI I have seen to date and when policies are updated you can see them updating in real time.
Also GFI will get their hands on Double Take which is not a bad piece of software.
I have used GFI's Languard, ISA Monitor, Mail Essentials, Fax Maker many times. So it will be interesting to see how the merge goes.