Shopping cart software and radiant

What sort of shopping cart software can be used with radiant?

this is something my boss and i have discussed. we have been tossing
around the idea of making a shopping cart extension. anyone ever
tried it, have any advice?

thanks,
andrew

I’ve never made an extension, but would use a shopping cart extension
heavily if it was available and worked well. I’ve used Substruct a
bit, and where it sucks (content management), radiant rocks. Perhaps
there is a potential synergy there?
-Mark