We are going back to Orlando next month (its been YEARS for me) and it just so happens a good friend of mine and her family are going back next month also... and we got to talking... and she went last year and they used the I Ride Trolley the entire time and didn't spend money on a taxi at all. http://www.iridetrolley.com/
I looked it up and thought I would share with others on this board, as we are definitely going to go this route now. It's only $8 per person for an unlimited rides/transfers/etc pass for 5 days with the trolley running every 20 minutes and until 10:30pm at night. My friend said it seemed like they never waited 20 minutes and it worked great for them. The map they have on their website shows them going from far north I-drive all the way to far south I-drive ~ everywhere we are planning to go for the week and then some! It even has an interactive look-up section to find what you want and get the stop number. Anyway, my friends highly recommended it so thought I'd share the info with you. It makes me feel better about deciding to cancel our rental car. I'll write a trip review when we get back to give my experience.