Yes sometimes if I am bored and looking for something to do I will search bugzilla and pick a random bug that can either be fixed or needs to be closed because it is fixed in a more recent CVS. So yes I would say its still worth keeping.
I lurk on the wine-bugs list, and I see evidence that bugzilla serves a useful function. Yes, there is much more 'in' than 'out', but it's not so bad it should be scrapped.
Cheers,
Jer