There are some reviews on a loop antenna made on the principal of a Morbius Loop - http://www.eham.net/reviews/detail/9441
I presently have a "conventional" magnetic loop for 20 meters. It works well. However, its bandwidth is limited even with a motor driven high voltage variable. The mystery of the Moebious Loop is that from the little research I have done there is no need for any tuning capacitor and it allegedly covers LF through 10 meters. The reviews seem to say that you can transmit with it but absolutely no mention if that is 10mw or 1kw power level. So a big question there. There is also no information that I can find that shows the performance over its claimed bandwidth. Does it work well at say 7mhz but is bad at 24mhz?
I understand the Moebius thing about crisscrossing wires as you wrap the wire around a 1m circle. However, I can find no info on wire size or number of turns. I am not excited about dropping $400 for a mystery antenna. I built one of those things during the EH antenna craze. Wasted a box of aluminum foil!