I wrote this up because I was tired of Stumbler Plus not working on my 3G running 3.0. For those of you with an iPhone 3G running OS 3.0: First: Install the broken version of Stumbler Plus using Cydia. Next, Download this file to the desktop: StumblerPlus-1.2rev1.tar.gz Official (WORKS): http://www.iphone.mysticwall.com/download/StumblerPlus-1.2rev1.tar.gz Mirror (WORKS): http://www.b3an.com/Public/StumblerPlus-1.2rev1.tar.gz For those of you without the ability to easily untar/gzip, here is a ZIP version: http://www.b3an.com/Public/StumblerPlus-1.2rev1.zip Next, download iPhone Browser: http://www.iphonebrowser.googlecode.com/files/iPhoneBrowser.1.91.zip Plug your iPhone into your system with the USB cable. Unzip both the iphonebrowser app, and the StumblerPlus archive to the desktop. Open up iPhone Browser, let it detect your phone, and then navigate to 'Applications' then to 'StumblerPlus.app' Drag the files from inside 'StumblerPlus.app' on your desktop, into 'StumblerPlus.app' on the iphone browser. Done. It now works.