Although the HTC Arrive is yet to come out, looks like Sprint is pushing some updates to the few carrier apps that are on board (seriously, it's sparse). Both the 'Sprint Zone' and 'TeleNav GPS Nav' programs received some 0.1 updates with, of course, no change-log to be noted. However, we can now at least use TeleNav as before we were unable to register the device, so perhaps that's the fix.
'Sprint Zone' is the carriers "hub" for the phone, offering software, tips and other Sprint news delivered to the phone (see it in our video hands on), whereas TeleNav GPS is a full-featured turn-by-turn navigation system (works in landscape too, woohoo).
Interestingly, it looks like Sprint is still finishing up some apps for Windows Phone as the Sprint Zone lists 'Sprint TV & Movies' but it's not available. However, 'Sprint Radio' ("powered by mSpot") is and it delivers "over 60 channels of crystal-clear music in all genres" and is free with your data plan (eat that, AT&T). Of course there is also 'Sprint Radio Extra' which you can pay $5.95/month for, zinger. Sprint Radio Extra is commercial-free and has ABC News, Fox Sports, NPR, etc. with customizations. It's like Pandora. We'll have more on Sprint Radio later.