Thanks, reading that now. Riak has a pipeline service called riak_pipe. One of the things I've been thinking about is having applications define a pipe, and then sending requests thru the pipe. The pipe is inherently sequential, so it fits well with a sequential language like javascript (you'd just write fittings in the coffeescript/javascript and then at the app level define the pipeline as a series of fittings.) On the other hand, this seems potentially less parallelizable and so I won't know which is more performant until I can run some tests (And I'm not yet to the point where I can do that.)

Anyway, reading the page you linked to now, will update this comment with what I learn from it.

EDIT TO ADD: Have read a good chunk of that page now. THANK YOU! It's very interesting. I'd considered doing something like this already, but had put it off for later. At this point I'm working on just the server side, though I've saved the article and will check it out again when I can had some higher level functionality to nirvana. Thanks!