Re: top 100 bbPress sites
_ck_: have you considered hacking up a plugin that gathers information about the forum upon activation and once per month after that and submits it to you in some way? Would automate the process way more for you and admins instead of having to post the link to you, and then you having to review all the sites.
I’m thinking it would fill out an HTML form and submit it to a site you had. Then people could log in and see updated information about the most active bbPress boards and what their functionality was. And you could compile a static list regularly.
If it was well written, I’d be interested in seeing it in bbPress by default so new admins who wouldn’t find the plugin here could activate it and submit statistics.
Ofcourse, there’d be some bozos trying to inflate their numbers sometime down the line..