Twitter Earth - watch Tweets in 2D or 3D, TwitterVision was all the go, another is Twitter Atlas.
BTW, Frantic Industries has collected all the Twitter fancies in one blog post, also see the Twitter Fan Wiki…another space of all things Twitter is Twitterforum.com.
Reko - recommended friends via the websites you visit, similar idea to Stumble Upon and del.icio.us, and perhaps those web surfing IM chats services like Others Online, chatsum, me.dium and others…slifeshare also fits in. Here’s a screenshot.
Maybe we could see something like Share Your OPML (a place to share and discover feeds), but instead Share your APML, here you would discover people most common with your APML. BTW, Reko seems to also have an OPML feature where you can share and discover people by feeds you have in common. [via mashable]
Yahoo! Alpha - like Searchmash, TagJag and lots of others seems to be a meta-search service. You can extend it by adding sites via the OpenSearch tool, you can also make your page public. In this respect it kind of becomes a search roller. [via mashable]