With Locale and the HTTP Request Plug-in, your phone can post a http request to any Server available to your phone.
You could update your status online, control your home entertainment system, log into a Wifi at Work.
This is a plug-in: it requires "Locale" from the Android Market. You can not start it without Locale.
*Now free - thank you to all paying customers for your support , which made this possible!*
With Locale and the Wake On LAN Plug-in (WOL), your phone can wake up a sleeping computer when you are in a specific situation, for example entering Work.
Your computer needs to be configured to be able to wake up.
Requires the free app "Locale" from the Market.