Launching officially today is Seattle-based startup Trailfire. Trailfire is a Firefox and Internet Explorer extension with a web-based frontend which combines social bookmarking, annotation, and trails (or a sequence of webpages). It’s also one of many alike social bookmarking services which feature a Firefox extension with a frontend web interface to add to it - BlueOrganizer, Diigo, StumbleUpon and BlueDot are some that come to mind (although there a few others).

The idea is quite simple. Users annotate a series of web pages and form a ‘trail’ of inter-related pages together - one site leading to another, and so on. Once a trail is complete and the user is happy with it, Trailfire enables you to blog it, send it to your friends, publish it to Trailfire’s own service, or even post it to popular social networks like MySpace, Friendster, Piczo, Xanga and hi5.

The AdaptiveBlue Approach to Semantic Web

AdaptiveBlue is developing personalization technologies that leverage semantics and attention. We are helping build the Semantic Web, but our approach is different from the traditional one.