If you managed to make it to TechEd 2007, hopefully you were able to check out our chalk talk on adding custom tools to Visual Studio. One of the things I showed towards the end is a project called VSSDK Assist.
VSSDK Assist is a project on CodePlex that uses the Guidance Automation Toolkit (GAT) to make VSX development (in C#) as simple and automated as possible. Imagine the integration package wizard on steroids.
Ever had troubles figuring out which registration attributes you need for a given feature (like an Options page)? Ever had trouble correctly embedding and registering a package load key (PLK)? What about adding a splash screen icon? This tool has wizards to help with all those scenarios and many more.
I would highly recommend checking out the tool if you haven't already. Pablo's done some really great work here!