Yeah I've seen both those before. The AD&D ones are ok, but I'd actually prefer a more "retro" look - b&w line art and so forth - and the info should be oriented in landscape rather than portrait. The LL ones are pretty limited in the sense that theres not really very many of them, they are one-sided and require a bit of work if one were to want to print them off in any sort of "collector card" manner.
A really huge set of cards all adhering to the same format and featuring artwork by some of the big names of the OSR (Mullen, Zeiser et al) would be really awesome.
I know, I know. Dream on...