I guess these will be coming out of Beta soon, as the MCP email newsletter featured them recently, and Microsoft Certified Professional Magazine now has a review of the electives. Summary of Mike Gunderloy’s review? Tough due to the wide spread of the material, do the analysis and web services/server components exams before you do them.
For the record, the two exams are 70-330 Implementing Security for Applications with Microsoft Visual Basic .NET and 70-340 Implementing Security for Applications with Microsoft Visual C# .NET.