Sonic State – Hardware Looper

see the Looperlative LP1 – The Art of Looping on video..
Sonic State – News (Video Item) NAMM06: Looperlative LP1 – The Art of Looping, Advanced stereo 8 track looper

also loopers up by electro harmonix and roland rc50 with quite longish time (roland: 49mins mono, 30 mins stereo)..