I installed this a couple of weeks ago. It's a pretty good update.

A few of the features off the top of my head are

Compatibility with new maps (including MapShare)
Trip statisticswith average & top speed :-)
Help Me for emergency services and roadside assistance etc.

There is also a feature that let's you specify a time you wish to arrive. you can then see on the status bar if you're going to be early or late at your destination. It was showing that I was going to be early for work the other day so took a 15 mile detour on some B roads. I arrived with a big grin on my face.

The only gripe I have with the TomTom Rider v2 is the volume on the Bluetooth headset. Does anyone else find it a bit quiet?