This isn't exactly new news, but I thought I'd mention it here. This summer, Microsoft will be releasing two exams,
70-330 and
70-340, designed to test your secure coding knowledge in .NET. The beta exams came out in April; I took both and was impressed with the level of questions on the exams. At this point, these exams apply as electives to the MCSD.NET program, but they're worth taking just to see if you are doing all you can to protect your apps.