Near impossible if you actually want to tie it into the current Bugzilla database :)
Although I suppose a few perl scripts to do some reorganisation of the IDs based on simple text matching might make some sense of it. I don't know how consistant Bugzilla remains if you go manually changing ID's in the database tho :P
Exactly, we have quite a few updates planed for AppDB. I will add a BugZilla link field to each App Version soon. I'll need someone with MUCHO spare time on his hands to actually go though and link each App Version Id to a Bugzilla Bug Id. This is NOT a small amount of work.