Is there any timeline for this?
I've come across some corporations which really would like an easy way to address this, and in fact at mozilla.org, a non trivial amount of triage time is spent trying to find the tracker for various extensions/plugins/random applications which each have their own hard to find web sites.
I'd really love to be able to simply visit ohloh and get a link to the bug tracker. Even if the bug tracker isn't searchable.
I understand that at the beginning I'd probably be filling in the links more often than I'd be finding them, but this really doesn't bother me.
It's also not immediately important for me to be able to use ohloh to search the bug tracker, although I recently described to a large entity how such a feature could be useful.
And yes, Mozilla projects are still waiting to see Mercurial support from ohloh, but we're already growing tools to handle Mercurial. We don't have much interest in growing a tool to map the world of software projects to record where their bug trackers live - this is something that I eagerly await from ohloh.