Untappd is so 2011. Buy Your Friend a Beer with Tweet-a-Beer!

I am not sure how well this will work for me, but Portland's tenfour announced Tweet-a-Beer at SXSW recently. Basically, it ties your Twitter account to your PayPal account and lets you send $5 to your friend so they can buy a beer. (I'm @hiikeeba if you're feeling generous.)

When I signed up, and accidentally sent myself $5 (or more accurately gave Chirpify, a Twitter payment app, ten cents for the transaction), I looked for the mobile app, but couldn't find it in the app store. Chirpify will DM me with receipts, but I don't know how to accept payments on the go, without opening Safari on my iPhone.