I have actually been able to verify my app's email address and add several test accounts as friends to that account and still those test accounts cannot add the app. Is there a definitive description somewhere of what it takes to add an account to a non-approved app? 

 Which error were yu seeing that required the UrlEncode change? I have not touched my app in a week or so and the server is now returning only 401. Did I miss a breaking change on MySpace?

I'm having the same problem with my app #101157.  I can understand that MySpace does not want broken apps out there but at this very early stage in the game putting apps into a suspended state that takes hours to get out of before we can continue testing and developing seems, well, less than helpful. 

I am pete_oleary on CodePlex I just uploaded a patch (my first ever on CodePlex) which is a single .cs file with some basic objects with XML parsing. No error checking of any kind. Let me know if it works okay: the upload and the code.

Okay, I got it now. I was thinking that you had to use OAuth to get a session token, which you do not have to do. Each call to the REST API authenticates itself with the code that you've already provided. Cool. I have whipped up a handful of C# objects which read the resulting XML from a couple of calls. They are very minimal and do no error ...

I changed the "consumer key" to match the "appliction uri" that I specified in my application's information and got user information about me. I guess I am logged in? Still wondering if I need token and tokensecret for HttpPostUtility.MyspaceRequest but it's late...   - <user ...

It's happening consistently right now. I assume that I got the consumer key from the right place? Also, I am using my own userid to construct the user URI: http://api.msappspace.com/v1/users/326710519.xml If this were all working correctly, what would I expect to see? Does the auth code redirect back to my app with the token and tokensecret ...

I think I got the example code incorporated and set up but when I fire it up I get this: - <error xmlns="api-v1.myspace.com">   <statuscode>401</statuscode>   <message>Authentication failed. Failed to resolve application URI "http://www.myspace.com/330683734"</message> ...