Im enthused about Paste but Im in a "sit and wait" stance right now. Particularly things like getting the command line interface to be consistent, as well as full documentation, would indicate that its approaching a "polished and stable" state.
Also, i think the whole concept of "download paste, and then effortlessly evaluate ten different frameworks" is what will really get people going with it. Until then there is still a disconnect between downloading Paste, downloading framework X, and then running them together, which detracts from its value. I guess thats the whole "distribution" issue you pointed out.