http://Twittercal.com is a free service that connects your Twitter account to your Google Calendar. Add events from your Twitter client. Follow the 5 steps procedure to get started.
Taggound is a social search engine mashup. What does that mean? Tagground searches various social web applications (ex. yahoo my web 2.0, del.icio.us, raw sugar, flickr, You Tube etc) repositories to retrieve relational data (ie tags, urls) that other use