From what I've heard, yes, they are going to be dropping DOS and some of the Win 3.1 stuff.... Win98 will still be on the exam, along with some Win2k and some Linux. For more information about the revisions, go to
CompTIA's webpage (CompTIA is the organization that makes up the A+ exams).
They are going to be beta testing the new exams starting on the 22nd, with the new exams going into full effect as of January 31, 2001.
For specific links as to what they plan on having on the new exams, here you are:
A+ Core Hardware exam revisions (PDF file)
A+ OS exam revisions (PDF file)
These two files give a general idea of what to expect the new exams to be based on. There isn't much else on CompTIA's webpage right now, as they're still trying to decide the best way to make the changes, I believe.
Hope this helped you out!
[edit] So to clear up my answer to your question, if you are able to sign up to take the exams on November 20, you should be taking the current exam, rather than the revised exams. Sign up soon, so you're not caught in the middle of the beta testing [/edit]
[edit 2] Looks like you'll be able to take the current exams up until the new ones go into full affect at the end of January 2001. Just read in the
beta testing FAQ's that the current exams will be available while they are doing the beta testing. Also, looks like they're offering the beta tests for a reduced fee..... $68 for each test, and if you pass both the core and the OS test, you become certified. Might be worth it to give the beta tests a shot for the reduced fee, and you might even do well enough on them to become certified. [/edit 2]
JW