just wikied him. Couple notes
"On May 9, 2005, Rickey signed with the San Diego Surf Dawgs of the Golden Baseball League, a Class-A independent league. This was the SurfDawgs' and the Golden Baseball League's inaugural season and Henderson helped the SurfDawgs to the league championship. In 73 games he had a .456 obp, 73 walks while striking out 43 times, and 16 steals while being caught only twice."
"Contrary to common belief, Henderson's refusal to officially retire is not delaying his eligibility for Hall of Fame induction. The five-year waiting period is based on major league service only. Henderson will become eligible for the 2009 induction vote, provided he does not return to major league play."
I'm not saying he can still play, just throwing this out there.