Along with the mlb.tv news, it looks like the cover art on the Netflix "channel" is larger (could just be my imagination).
Amazon's channel got some nice upgrades. They brought back the ability to check the freebies from the Roku DVP and have added a "Search" box.
I imagine MediaFly, Blip.tv, possibly Youtube, etc. will have similar search capabilities.
As many have stated before, entering text by pointing at a depicted keyboardish interface is not meant for heavy use.
I can only hope that Roku considers adding Bluetooth support in the next version of the DVP so that I can sit on my couch and use a real keyboard.
Looks like a nice upgrade - adding some polish to Netflix/Amazon and pointing towards the future with the mlb.tv availability.