There appears to be a bug in how Visual Studio does "Add Service Reference" proxy generation for VB.NET projects.

I ran into this issue when trying to add a service reference to Bing Maps and I believe it is not limited to that. I think it stems from it misunderstanding that enum instance variables cannot be tested for equality using .Equals in VB... not sure why.

I think the solution is to simply replace the offending line:

If Me.enumfield.Equals(value) <> true Then

with

If Not Object.Equals(Me.enumfield ,Value) Then

BTW: DO NOT compare boolean results to True or False as they have done!

Use

If boolean_results Then

or

If Not boolean_results Then

Got the BlackBerry VS9 Plugin running in Visual Studio 2008 running in Windows 7 x64.
Not sure what of these steps are really necessary, but this is what I did:

Copied "Research In Motion" directory from "Program Files (x86)" to "Program Files". This gave me a different error.

Discovered using SysInternal's ProcMon that it was trying to launch RIM.Net.Tools.ScriptHost.exe from the root, so I copied that and all the other stuff in the plugin's bin folder to the root, yes, C:\.

That gave me another error, so then I set VS2008 to run in XP SP3 compatibility mode.

Tada!