The clipless/clip pedals never made sense to me. If you want them so that you can either ride with your clipless shoes and sometimes with other shoes, why have the clips? The clips hit the ground when you use the clipless side, unless you take the clips off.

I also never liked the platform side of these types of pedals, but Shimano has just come out with a new one, the PD-A530. This one is a clipless/platform that does not accept the clips and I like the platform better. I haven't used them yet, but I am planning on buying them soon. JensonUSA has them and you can find them on eBay.
Shimano also has the PD-M324. This is the more traditional clipless/platform pedal that accepts clips. You can find these in a lot of places, Nashbar, Performance. Performance and Nashbar also has their own version of these.