I've seen an amazing contest! You must write a funcy JavaScript demo that is maximum 1024 bytes! There are incredible demos. See http://js1k.com/2010-first/

I posted a new article on CodeProject.com that demonstrates the usage of SignalR to asynchronously communicate from server-to-client on web.

Click here to read it:
http://www.codeproject.com/KB/aspnet/RealTimeAsynchWebPages.aspx

I've chosen as CodeProject MVP: http://www.codeproject.com/Members/hi_kalkan :)