You can buy it from Humble DRM Free, no need to contribute to Gaben`s pile of golden Cadillacs. Mind you, they still have to update the version there (must crank up my pestering campaign up to 11)
I totally updated it
(but you can't actually buy it on Humble at the moment, we have to get the full store site setup and we pulled the widget almost immediately after launch when we realized how much of a pain it was to update. Since they made it easier to update now, I'll probably put the widget back up.)