Domain list for Google Custom search engine

I’m not able to find any Google custom search engines for ruby/rails
that are current and show what domains are covered so i went into
delicious and counted up the URL’s tagged “ruby” for the last 6 days
or so. Just to be clear, it’s the domains with the largest number of
“ruby” tags, not the largest number of URL’s tagged “ruby”.

Here’s the top 75, any others? Or should i cover, say top 100