Tee2Green is selling a device designed to perform most duties of a caddy. The sureshotgps acts primarily as a rangefinder, using GPS to determine distances tee to green, ball to hazard, etc. around the golf course. It will also recommend club selection, keep score, and have the ability to store data for 10 courses. At $400, it's no bargain, but if you could afford to pay a caddy to begin with, we don't imagine that's a problem.
The GPS golf caddy, via Tech Digest