When I switched Ubuntu package hosting to a launchpad PPA (away from manual .deb hosting), one thing lost was the ease of archiving old versions, since Launchpad doesn't provide this.
I've written some scripts to manually copy the packages from the PPA to form a new archive and am hosting it at the old location http://wine.budgetdedicated.com/archive/ -- currently it carries all the Wine packages that have been on the Ubuntu Wine PPA since 1.3.3 or so.
The main use of the archive is to aid in regression testing - installing from packages is much easier/quicker than recompiling from source, and will help you narrow down the last working/nonworking wine version before doing a proper git bisect.
All I have to do is run the script every time I update the PPA with new Wine packages, and it's good.
Due to server space issues, I don't plan to archive daily package builds (which is my next project).
Thanks, Scott Ritchie