Ron Santo fans – you have reason to celebrate – WGN and Santo have agreed upon an extension that will keep Santo broadcasting on the radio through 2012.  Santo has diabetes and has dealt with the ramifications of his disease while missing time periodically to deal with those medical issues that arise from time to time.  WGN will still work with Santo during those times of.  Pat Hughes will still call the games, while former Cubs pitcher Dave Otto will continue to fill in for Santo when he is not able to make certain broadcasts.  Santo will be 70 in February, but is thrilled to be able to keep calling Cubs games for the foreseeable future.  “I go nuts when I can’t be at the games, but I have to think about my family and my health… So, if I’m not feeling well or I get wiped out, I’ll take cretain days off and WGN has no problem with that… I’m feeling good and I’m on a real good program now where I’m on a stationary bike, and my wife got me a special chair that I can do sit-ups in.”  Yippee – gotta love listening to a Hughes/Santo broadcast – doesn’t get much better than that…