Synchronicity Live is a super cool web and desktop application that allows bands to record and stream live performances. The web application is written in Flex, while the desktop portion uses the freely available Adobe Flash Media Encoder application. Bands can sign up and then stream live concerts to fans, and record them to be viewed at a later date. Fans of bands can watch live streams of their favourite bands, or recorded versions of previous concerts.

The concert pages show information about the band, fans who attended the event, statistics on the show recording, and an online chat. The developers have implemented deep linking into the site, so you can easily link directly to bands or concerts, even though its a Flex application.

For those of you interested in the technical details, the company has a detailed page up on how bands can publish their concerts.

Take a look at SyncLive. Its definitely one of the top Flex sites I've seen - the custom skins hide the Flex components well, the combination of desktop software and web software is innovative, and technically the deep linking support makes the site easy to use.