Alas, I am too late.
"Method and device for measuring rotation speed of rotating equipment"
http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=36&f=G&l=50&co1=AND&d=PTXT&s1=bicycle&s2=video&OS=bicycle+AND+video&RS=bicycle+AND+video (patft.uspto.gov)
"Exercise system with graphical feedback and method of gauging fitness progress"
http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=25&f=G&l=50&co1=AND&d=PTXT&s1=bicycle&s2=video&OS=bicycle+AND+video&RS=bicycle+AND+video (patft.uspto.gov)
"System and method for pacing repetitive motion activities"
http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=47&f=G&l=50&co1=AND&d=PTXT&s1=bicycle&s2=video&OS=bicycle+AND+video&RS=bicycle+AND+video (patft.uspto.gov)
Googling around initially I knew that some companies had done things to provide metrics on bicycles. I didn't think people had already patented things so absolutely specific to what I'm trying to do here.
Oh well. It's a fun hobby, I guess.