Depending on the bug-tracking system you use, it might be possible to create a public-facing interface which allows people to see the progress directly.
Of course, you'd need to make sure it provides both public and private diaries and made sure everyone knows the difference - that confusion has been the source of a few bits of amusement for me over the years.
Certainly Roundup is pretty configurable to allow that sort of thing, although I don't know how much it does out of the box. Also, Fogbugz is a nice system, but pricey. I've worked with the Cerberus ticketing system in the past, but I found it to be less than friendly.
If nothing else, I'd suggest pasting a forum link as part of the bug description when you create the issue - at least that'll make it easy to find.