1. avast for Linux Workstations (scheduled for the end of the year -- and most likely, togher with a free home version) WILL have a GUI, of course. Here're some preliminary screenshots.
2. Actually porting to non-x86 platforms is now a bit closer. At least I do have a pretty good idea about how to overcome the limitation. But it's still a matter of years to make avast for Mac/Solaris/AIX etc. a reality.
Thanks.,