I really liked Bueno/Fukumachi, the first Swayzak release (1997). And they've put out quite a variety since then, many of which are at least pretty good. When they came to town here in Portland about a year ago, they played a great live set and I had a long talk with them afterwards (which also involved visiting my office and admiring my record collection, which always goes a long way with me :)
I haven't heard the current stuff but it wouldn't surprise me if they picked up the Joy Divisionish sound for the moment -- David Brown is from Scotland so I presume the Mancunian influence is pretty strong. But what really drives these guys is dub -- I know they were big fans of Adrian Sherwood and the On-U Sound fraternity, which has also been a key influence for me (the on-u mailing list, which I still am on, was the first one I ever subcribed to on the Net, back in 1989). So I would recommend (to Sean and anyone else) to check out their other stuff as well. fred