The install count can be tracked from the channel page on the website. If you want more statistics than that, you'll probably need to track them yourself. You can get the unique device ID via the roDeviceInfo component.
My Channels: http://roku.permanence.com - Twitter: @TheEndlessDev
Instant Watch Browser (NetflixIWB), Aquarium Screensaver (AQUARIUM), Clever Clocks Screensaver (CLEVERCLOCKS), iTunes Podcasts (ITPC), My Channels (MYCHANNELS)