There are two important things everyone should know about, and I’ll add links to them on the left-hand side.
First, there’s the FRBR mailing list. It hasn’t been seeing much traffic this year, but what’s there is always interesting. A (slightly out-of-date) PDF of the archives is available to anyone, and if you join the list you can see everything.
Second, and also looked after by Patrick Le Boeuf, is the FRBR bibliography. There’s a thirty-nine page PDF there that lists all FRBR-related publications up to late October 2004. To stay even more on top of things, you can grab this always current RTF version of the bibliography, which right now is forty-three pages long and was updated a couple of weeks ago. If you’re doing any research on FRBR, that’s the place to start. It has full citations for sources in many different languages.
Both of those links are on the FRBR Review Group’s web site, which is linked on the left, but I want to point them out specially. I myself hadn’t looked at the bibliography in a while and hadn’t realized how large it had become. It’s a great resource.