More on Yahoo
Buried away in their help pages is the hostname meta word. I can search for pages from "rdmsoft.com" without searching its subdomains, which is much better than the "+site -site -site" mess I was going to use with Google.
I did drop this idea in the Google suggestion box, but for now I'll be using Yahoo! for my site search and probably other stuff I do in the future.
(The only thing I'm not sure about is the query limit being 5000 per day per IP address. Not that I'm going to use that many, but it could add up on a shared server.)
Feedback is closed. Feel free to contact me privately.