Slope the base inside sink cabinet?
The recent post regarding a mat for in the sink in case of leaks made me wonder if anyone has had the sink cabinet floor sloped about 1/4" higher in the back than the front - this would encourage water to come forward rather than pool, potentially seeing a leak sooner. With just a 1/4" slope over 23-ish inches, it doesn't seem like it would be enough to make things uneven, but enough to encourage water to come to the front where you would more easily see it.
Since I haven't heard of it before, maybe there are issues with doing something like that I'm not thinking of.
Right now, I'm leaning toward using a small piece of vinyl flooring to line the bottom - my mom has done this with several of her cabinets have hold "messy" things and it has worked very well for her. I liked the Rev-a-shelf liner idea (http://www.rev-a-shelf.com/p-226-undersink-drip-tray-sink-and-base-accessories.aspx) except that it has grooves and I think that unevenness across will be a problem.