Hi! Because I no longer use Tent, and cannot update TentRSS to deal with revisions to the Tent protocol, this hosted instance of TentRSS has been discontinued.
TentRSS is open source and you are welcome to grab the source code and run your own instance. I don't plan to update this code, but feel free to fork.
There is also a forked version running on Heroku, courtesy of Ian Young.
— Scott Feeney, May 6th, 2013