This can be done. There are a few things to consider when thinking about taking on a project like this, such as if slate is the right material for you. From there you should explore the type of slate in the pool table you are considering for use. There are basically two types of pool table slate, single slate pool tables and 3 piece slate pool tables. This will lead to further considerations such as taking in to account countertop sizes. We did an outside bar with repurposed pool type slate that worked well. I have included a few links for you below that you may want to look at. If you have any further questions please do not hesitate to ask.

http://greeneprojects.wordpress.com/tag/slate/

http://www.oregonlive.com/hg/index.ssf/2009/01/two_foodies_wait_to_stumble_ov.html

http://esterrepublic.blogspot.com/2008/08/as-promised-black-slate-countertop.html

I can tolerate the "flaws" of slate, I think; I was seriously considering buying it from M. Texeira. From the picture in the craigslist post, it looks to be 3 pieces, which would be easier to handle, but I still would have to figure out if I could coerce someone into cutting it for me.

Hmm, also will have to see if it is even enough, after the segments with the pocket holes are removed, to do most of the counter.