I've successfully tested the latest Linux-Version of ST on Ubuntu Studio 12.04 in combination with CRC-mmbTools and an Ettus USRP-B100-Box for a fully compliant DAB-Transmission. All runs nice and smooth on a (somewhat older) Lenovo ThinkPad-Notebook with a Core2Duo-CPU, even with the De-Clipper on!
There's a script running in the background that does the following signal pipe:
vlc (plays a wav-file and upsamples it to 48 kHz) -> stereo-tool (processing) -> toolame (dab-mp2-encoder) -> crc-dabmux (dab-muxing) -> crc-dabmod (dab-baseband-rendering) -> wapp (dab-baseband-player to the USRP)
It is also possible to get audio from JACK to ST via VLC and the jackaudio-plugin.
Furthermore, I've built a GNURadio-application that allows to transmit MPX-WAV-Files (or stdin-datapipes) on FM directly via the USRP-B100. Unfortunately, it doesn't work with ST directly at the moment, because sampling rate input for stdin can be only 128 or 256 kHz (yet), and ST doesn't put out an mpx-stream with this sample rates. For first tests, I upsampled the MPX-recording of the Omnia 9 from the Processing Freakday to 256 kHz, and got it to work. Stereo, RDS - everything on the air with a tiny little box!