The Shimano 545 (which uses a standard spd cleat, but has a platform, so you can still pedal even when you can't get clipped in quickly).
http://www.mtbr.com/reviews/Pedal/product_22423.shtmlThe Time ATAC pedals are my all time favorites (a bit of a platform to pedal with when you aren't clipped in, and NEVER get clogged with mud, etc.)
http://www.mtbr.com/reviews/Pedal/product_22476.shtmlSpeedplay Frogs are nice too (totally unique clipping mechanism, also clog free)
http://www.mtbr.com/reviews/Pedal/product_22476.shtmlAnd last but not least, Crank Bros. Eggbeaters which use the same clipping mechanism as the Shimano pedals above, but have 4 sides that you can clip into so you can always get clipped in really quickly:
http://www.mtbr.com/reviews/Pedal/product_121990.shtmlDammit, now you have me wanting to spend money on a bike again, I haven't had one around for 2 years and I miss it.