What dinner shows are you interested in, ones on property or anywhere in Orlando?
I think the Disney ones are the Spirit of Aloha and Mickey's hoop de doo review and the best place for info on these is probably alearsnet.
If you're after non-Disney ones in the florida area there are several. Probably the biggest/most well known are:
Arabian Nights
Medieval Times
Dolly Parton's Dixie Stampede
I'm not sure the best place or info on those but once you have the names it's not to hard to google it.
Personally I've not done the Disney shows, but of the others I liked Medieval times best, Dollys a close second but didn't rate Arabian Nights much as I had a bad experience ith the food there.
Hope that helps a little.