I just picked up Yummy FTP from Macappaday for free (www.macappaday.com), 5000 copies available.
It interfaces perfectly with TextMate and you can replace most of the Transmit commands just by changing Transmit to Yummy FTP. It uses a lot less CPU on my machine and I seem to get faster transfer rates. It supports remote editing and file syncing and just about everything I've ever used Transmit for. If you can score a free copy, I would do it.
Just thought I'd share.
Brett