Since .NET 2.0 beta2 was released I've received a few inquiries about what happened to tracing SNAC (that's SQL Native Client). Looking at the adonetdiag.mof file, the SQLNCLI.1 entry (that's SNAC) was removed. I also got a solution/workaround from Glenn Johnson, who asked the question, then provided the answer faster than I could fly from Portland to San Jose and figure it out myself.

The workaround for this is to:
1. Start with adonetdiag.mof that was posted in my article. http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnadonet/html/tracingdataaccess.asp
2. Edit this .mof file to replace to entries for System.Data.SNI.B1 with System.Data.SNI.1 from the new .mof file provided with beta2 . This file is in the Framework directory where .NET is installed.
3. Also change the file "ctrl.guid.adonet.beta1" from the article downloads to put in the new GUID for System.Data.SNI.1 (replace System.Data.SNI.Beta1). Run this scripts from the article as before.

What appears to have happened is that:
a. SQLNCLI.1 entry was removed from adonetdiag.mof (SNAC is not part of .NET, so this makes sense)
b. The GUID for SNI tracing has changed.

Happy tracing. Thanks Glenn.