I too was going to respond to the initial request for information about Rhythm Willie by suggesting an archive search, but took a moment to take a look for myself, using "rhythm willie." Nothing, nada, zilch, zip/squat. I deliberately misspelled "rhythm" and that didn't help either. What did work was searching "willie" alone, though it yielded plenty of Willie Nelson posts also. Fell asleep before I could post my result. So, what's up with the search engine? I took a look for "Jerry McCain" as a check and turned up a bunch of items. Is the search engine just not sure how to spell "rhythm"? :-)
Hate to see further undeserved obscurity for Rhythm Willie. Have also seen what seems like an inordinate number of posts lately which asked questions that really should have gone to the archives instead, but can't blame people if there's no there there.