>Do you think it's a good idea to work for the MCSD exam?

It can help make you look good on a resume. A future employer might see you as a person that is trying to improve themselves. You will learn more about VFP.

>I only know about the book by Cindy, can you suggest some useful resources?

Here is my standard blurb

The beta study group created a study guide in the fall of 99
http://fox.wikis.com/wc.dll?Wiki~CategoryExam70-155
http://fox.wikis.com/wc.dll?Wiki~CategoryExam70-156

Cindy and I wrote an exam study book. The propaganda is here
http://www.hentzenwerke.com/catalogavailability/certfox6.htm

Free chapters here
http://www.hentzenwerke.com/samplechapters/zsamplechapters.htm

Micrsoft info here
http://www.microsoft.com/trainingandservices/exams/examasearch.asp?PageID=70-156
http://www.microsoft.com/trainingandservices/exams/examasearch.asp?PageID=70-155

> I want to take the 2 Visual FoxPro exam and the MS SQL 2000 exam...

This is a good strategy since you can use 2 of the MCSD exams as credit towards an MCDBA.

>What do you think? Any suggestions/experience?

Study for the VFP exams was an intense learning experience. I am a better VFP developer because of it. The 70-100 reinforces programming concepts that are useful. For me personally, studying for VB6 exam as an elective helped me to become better at VB and helped me to learn its strengths and weaknesses.