Not sure what type of mobile you have but on my iphone 3g, NP.mobi vs. NP.com is no comparison. Sure you can access and navigate NP.com but it's so much easier to just go to the .mobi. That's just my experience though.
I like Air.mobi a lot and wanted to bid but funds were tight at the time. It is a very brandable domain IMO. Congrats on your winning bid
It's hard to put appraisals in on names that just sold as the purchase price kind of becomes a defacto amount to consider as current market value. That said I'm sure you could get low $x,xxx to mid $x,xxx wholesale and low to mid $xx,xxx for serious end users with a strong game plan.
I'll offer $1250 for Air.Mobi if you would like to do a quick flip.
DVR.mobi has potential as well. My guess is you could get mid $xxx - low $1,xxx for wholesale. Not as sure about end user potential yet I can see phones being used as DVRs in the not so distant future since laptops are already being used for this function.