ProxySetting is a simple application for Google’s Android platform that allows users to specify an HTTP Proxy address to use when connected to a Wifi network.

At the time of writing Android only allows HTTP traffic to be directed at a proxy when using a Mobile network. It is likely that Android will be updated in the future to support the use of Proxies on Wifi networks, but for now this application aims to solve the problem.

http://code.google.com/p/proxysetting/