This looks really cool and useful, and FWIW was apparently part of Edge's rig at some point. It's a FET boost with volume, bass & treble controls and a high pass/low cut switch. From the website:

"...having bass and treble controls and the low-cut switch already place the Sweet FA ahead of the myriad of other boosters only offering a single voume control."

I don't know what the high pass switch would sound like but a good boost with good EQ could come in real handy. It's the Sweet FA link:

http://prophecysound.com/

Price converts to about $160 US shipped from AU

Looks Great!