Envirology

I found an interesting article about web 2.0 realtime applications:

http://earth2tech.com/2009/04/15/twitters-an-energy-guzzler-other-hard-truths-for-web-20-app-addicts/

"web applications that involve constant updates and real-time information — such as many of those on the Twitter platform and especially those supported for mobile — are like the Hummers of web apps, guzzling away energy through continuous server connections for each user".