twtbizcard - from the folks at twtapps…you can now create a virtual business card, and send it to someone eg @elusa here’s one of my cards to keep in touch #twtbizcard
It also keeps track of sent and received cards, and tweets and retweets…only the people you send it to can read the details
twitmatic - search and watch video’s being linked to in Twitter.
tagth.is - tweet @tagthis with a link and keywords, and that link will be bookmarked in delicious. I prefer this to Tweecious which automatically bookmarks every tweet that has a link. But what I really want is a button in my favourite Twitter sites like dabr and filttr to send a tweet to delicious