I have a Zalman 7000Cu (the original model). Before I had to RMA my Gigabyte board, I got it working perfectly on the motherboard. It didn't work out of the box, but all I had to do was contact the Zalman reseller here in the UK, and for no charge, they sent me a new backplate with new nipples. It got to me within a day. Pretty sweet service if you ask me. I had some really good temps as well, even overclocked and overvolted (3200+ @ 2.65 ghz, 1.55V), it never went over 47 in a not spectacularily ventilated case.
Adrian