Recently Luke Johnson of WhatRevitWants launched a node-centric site to demonstrate uses of OOTB dynamo nodes and custom packages. He invited several of the Dynamo package developers (including myself) to contribute.
This site is now called DynamoNodes (formerly DynamoWorks).
There has been a lot of momentum and some exciting things are happening.
I now have a landing page for Rhythm on that site.
Go check it out and have fun with Dynamo!