For all those people who like me needed a Wii Application Wizard for Visual Studio based on devkitPPC i created i simple application that helps you installing and configuring a useful WiiApp Wizard for VS 2005/2008/2010.
This is a screenshot
the app is freely downloadable from here and requires MS .Net Framework 3.5
Did you run with Admin privileges?
It worked form me both for VS2008 and 2010 on Win7 x86/64 Vista and XP...
Concerning the existing Wizard: d'oh!... i spent one hour of my busy life developing an app that already exists...