I took the 70-294 today and passed. I was rather surprised at the difficulty of the exam. I felt very confident with the material, but the questions were really tough. They were more lengthy than the other exams, IMO. I changed more of my answers in review than any other tests. There were a lot of questions on Group Policy, OU Structure, Site Links, and Trusts.
I had 3 sims, which I found very straightforward, dealing with GPOs and Sites.
To prepare, I used MS Press book, Syngress Book, Measure Up practice tests, and two test domain controllers for practice.
Now, I'm going to start studying for 70-298, the last test before I earn my MCSE.
Thanks for the info and support on this site, everyone! I'm almost there!

-Josh