About 2/7ths of our domains currently have analog 5 running on them. Unfortunately, it's not so easy for the other ones to get it.. for system stability and what not we need to upgrade the debian distribution for the entire machine that runs the stats to "woody" in order to upgrade to analog 5. We upgraded one of our stats machines but for some reason the admins won't do the others until woody is released as stable. There's no current ETA on that from the debian team though, so we're kinda in a holding pattern until then.
But sooner or later, analog will be version 5! I promise!