They did not make any announcement to phase out the server version of avast 4, why would they phase out the desktop version ? I believe they will end support when avast 5 will be “feature complete” (ie, when all the features they planned for the 5th version are implemented) - pure speculation ofc
My personal opinion:
From January to July, the version 5 was updated in ~50% of the avast installations.
It’s possible to get the other 50% from now to the end of the year, although the curve for this should be slight.
But, they won’t be able to finish the support. I think it will go for 2011.
It has always had a LAN card but, at the moment, I connect through a modem.
What is it used for ?
Well, at the moment, I am typing this. The machine is a Pentium II, and is used to connect to the Internet and for general Web browsing. I maintain my PHP website on it (although the actual web server is elsewhere).
I resent an OS that steals all my CPU cycles for fancy whiz bangs that I do not want and would never use. Unfortunately, even free software that is compatible is becoming increasingly difficult to find, so I guess I will soon have to upgrade to a new(ish) computer running XP. (Anything more recent than XP would be suicide; visit http://www.cs.auckland.ac.nz/~pgut001/pubs/vista_cost.html.)
This is also of interest to me. I am running a “tweaked” version of Windows ME which is very stable. Also, I use other software which is not compatible with later versions of Windows. However, I am beginning to think that I will have to upgrade sooner or later.
In the meantime I would be very sorry to lose the protection of Avast!