TVRX is the first real HF frontend by Ettus Research for the USRP. It is based on a microtune tuner and covers 50 to 850 MHz RF.
I'm still intending to build a couple of frontends on my own. One of the most important ones would be a 15.6MHz frontend for ISO 14443 and 15693. Also, I have already obtained a number of tuner samples with I/Q output, which would make perfect match to the USRP.
Meanwhile, I'm still experiencing a lot of problem with gnuradio. While the USRP communication seems to work fine, gnuradio segfaults all over the place. Maybe this is related to x86_64, but I cannot say more about it at the moment.