[TxMt] what URL for new versions?

[TJ Luoma]

Is there an URL/RSS feed which will always show the latest version?

Due to my limited Internet access (long story), I have a shell script
which runs on a remote server every night and tells me if I need to
update any of my apps.

Most of the time this is pretty easy, but TextMate doesn't seem to use
Sparkle for updates, so I can't figure out what URL to check. There
has to be one since the app supports built-in version checking.

Any help appreciated :-)

TjL