Here is an idea:

We use existing delicious API.

Check out these URL's:

https://api.del.icio.us/v1/posts/suggest?&url=http://smartmobs.com

the above will let you employ the same tag recommender that is used inside of delicious anywhere

https://api.del.icio.us/v1/posts/add?&url=http://socialsynergyweb.org/cu...

The above will add (or should add) a post to delicious, and pass in tags, description, etc

The goal of this API (Application Programming Interface) is to provide direct, high-level access to the data contained in the MediaWiki databases. Client programs can use the API to login, get data, and post changes. The API supports thin web-based JavaScript clients, such as Navigation popups or LiveRC, end-user applications (such as vandal fighter), and can be accessed by another web site (tool server's utilities).

All output is available in a wide range of formats.

Just making note of where this is