This was the comment I just left on one of the express developer blogs:

I was able to successfully install Visual Basic Express on a machine that didn’t have any previous version of Visual Studio, but I have not yet been successful to date installing VB Express on a machine that has a working version of Visual Studio (Professional) 2003. I have submitted a bug report and emailed logs to the proper party. Another user responded that he got it installed to co-exist with Visual Studio Enterprise edition.

Could be just an isolated circumstance, but for something “express” it is not expressly easy to get up and running if it won’t even install. Current Visual Studio users who don’t have a spare machine it’s download beware …

It is beta though, so this has to be taken into account.

Darn! I would really like to get this working on one of our machines that already has Visual Studio on it, so that I can enter the Summer of Coding contest!