We had our own table, right across the way from TradeHill and next to Kipochi. It was a super exciting place to pitch our product to attendees... never have I had so much engagement from viewers! I love the BTC community.
Lots of similar suggestions from BitCon attendees about using BTC for reimbursement... the biggest problem we face with that is our relationship to carriers. We already technically allow users to violate TOS because our app makse it very simple to avoid the tethering fee for sharing your data plan with your laptop, tablet, etc... the thing is we don't want to take too hard of a stance against the carriers. We'd rather make them understand our value to their users as a tool for staying connected to the Internet.
AT&T currently has us blocked for its users on Google play while the rest of the carriers (including Verizon) have not done anything yet. If we implemented a way for users to basically resell their data, that has a chance to piss them all off. We're taking it slow and steady... a less direct method for being compensated for sharing data is enabling users to receive tips. Trust me, I would love to see all of this happen and say SCREW YOU to the carriers... but my bosses have other priorities. Heh.
The more the BTC community engages with our application and leaves feedback on such a feature, the more incentive my company has to implement it.
If y'all leave comments on our online community, in the Google play store or as a message to our "support" email address about wanting to be able to do this, those are the most direct lines for letting the rest of the company know. I'd link you to them, but I'm not allowed to do that yet on here... so you'll just have to do a quick google search to find 'em.