Y'all might think that Arctic Silver's new ArctiClean solution is a silly little thing to buy, as Isopropyl alcohol dissolves the old compounds, but I bought some of it, and I've been really impressed. It's a two step forumula, the first step dissolves anything that's on the chip, and works way better for getting the pad-style compounds off than alcohol. The second step polishes the surface much much better than alcohol does, really gets in the grooves and cleans the hell outta any surface. It's a bit spendy, but if you do a lot of work on rebuilds and such, it's a great purchase. I highly reccomend that. I'll never go back to scrubbin with alcohol. This stuff takes the effort out of the job, which is actually better, because you'll be less likely to lose your grip on it and send it skittering across the table, pins down. *shudders*
Funny you mention that you use Ceramique. MaxPC did a comparison between AS5 and Ceramique, and a few others, and Ceramique was actually cooler than the AS5 was, by just one degree. I've used AS3, Ceramique, and AS5, and for long-term, non-reconfigurable stuff, I'd use Ceramique over AS5. The compound bonds better than AS, in my opinion. I had a hell of a time getting it off of a 64 bit chip, even after letting it run for a while to get it heated up. Even after that it took quite a few coffee filters and alcohol to get the stuff off. If you do a lot of work on your system, and tend to change coolers from time to time, or upgrade a lot, I'd say AS5 works pretty well as it's quite a bit easier to get off.