I've got two of their albums, Generation Sap & Crave. I recommend No Stress, Selophane Fixtures, King For A Day & Accidental Ornaments (a bonus track on some versions), from Crave (the album with Karma Killer on). And from Generation Sap, I recommend: Violet High, Supergod, The Hive, Sump & Slaves. More recently, as of sometime in 2002/3, Cyclefly have unfortunately disbanded. But the good news is that 3 of the members have re-formed in a new group called "Hueman". Their first demos are just coming out now, and do sound quite good IMO.
Their official website is just cyclefly.com, but it hasn't been updated since early 2002. But if you type Cyclefly into google then there are a fair number of fansites.