On the general topic of DIY councrete counters, I'd recommend "Concrete
Countertops: Design, Form, and Finishes for the New Kitchen and Bath"
by Fu-Tung Cheng. Amazon has it at
http://www.amazon.com/exec/obidos/tg...1060020885/sr=
8-1/ref=sr_8_1/103-9001540-3922249?v=glance&s=books&n=507846

I found the book very interesting, and while we went with another method
for a recent remodel, I wouldn't hesitate to try concrete after reading
this book.

-Killroy