It looks to me as though the source is freely downloadable from github if you want to compile it yourself, but the Mac installer version is being sold at its usual price.
Since you can certainly sell a GPL'ed app, is this "well-planned open sourcing" going to continue to sell the installer version, start giving it away, or discontinue it? I don't see any mention of this issue on either site, but maybe I just missed it.
There is no "installer version" of TextMate. It's just an ordinary application bundle. See for yourself — here's the 2.0 alpha posted on the Macromates blog; it will auto-update to the latest alpha:
Since you can certainly sell a GPL'ed app, is this "well-planned open sourcing" going to continue to sell the installer version, start giving it away, or discontinue it? I don't see any mention of this issue on either site, but maybe I just missed it.