Craigslist don't provide any APIs for data access.
I would like to write a small client to parse data from their RSS and reflow it.
I would like to do this without setting up a server. What client side tools/JavaScript are available out there can allows quick and easy parsing of RSS feeds?
You may want to check out Using Javascript to display RSS for some links to JS clients.
Also yahoo pipes has some interesting ways to interact with RSS feeds