Seems like a very good service!

One comment though: there are very few details on radishapp.com explaining how Radish works. The blog post describes a bit more: there is a daemon running besides Redis that sends statistics to Radish.

A little 'About' page on radishapp.com, with the most important information from the blog post, plus a list of supported platforms (does the daemon run only on Linux, or on all platforms where Redis runs?), would be very nice.