I've been getting a good response from contributors for the quarterly triolet review.
The only publicly-accessible part of triolets.org is the classic triolets (i.e. the ones which are out of copyright). When I release an issue of the quarterly triolet review, those will be added. But there are several triolets which are still live on the site (mostly mine), such as In depths of darkness, which aren't linked anywhere because they don't fall into either category. Of course they'll trickle in slowly if they're printed in the review, but I don't want to make it all about me, and it'll take years to get through them all. Maybe I need a new section for them.
I've added a few new old triolets to the site, including the rather silly The child is father to the man by Hopkins, and All women born by Bridges, which is so misogynistic I almost didn't include it even though it was written by the then Poet Laureate. Then I decided if he had opinions like that, it wasn't really something I wanted to hush up.
If you use Twitter, you can follow @triolets to get a random triolet every day (and similarly for identi.ca).