I just released a first milestone of HSJN, the "Html Snippet Javascript Notation" system for storing HTML snippets in a JSON-esque format. The parser is a straightforward jQuery DOM Builder, with support for custom attributes, styles, and neatest of all, jQuery chains. (Yup, you can put jQuery function calls inside of HTML snippets, meaning you can put in one simple object an entire jQuery Tabs widget!)
Check the project out here: http://code.google.com/p/hsjn/ I'd love to hear some feedback on it!