I believe in June of each year Microsoft posts each exam that is slated to be retired in the next coming year. So I think you have a good 18 months worth left to get your MCAD/MCSD 1.1.
In fact, that's what I am doing now. I have passed two tests, getting ready for a third, and hopefully knock out the other two in the coming few months for the full MCSD.
Next year I will focus on the 2.0. The certification track for 2.0 is quite different and a departure from the past.
The one thing I like is that Microsoft no longer retires your certification as they once did.