We went to SW in 2005 from AKL and took a taxi. The hotel concierge told us there were no shuttles available to other Orlando parks. Because of the location of AKL, a taxi I think cost us almost $50 round trip.
This past Aprill, from POFQ, it was a better location and the taxi from the hotel to SW was around $40.
We also went to UO for 2 days during our trip and I think that was around $18 or $20.
Someone told me back before our April trip that Orlando has a trolley. I couldn't find any more info on this though. I think the trolley has alot of stops and I'm not sure where you get on and off.
If it doesn't pinch your wallet, I would suggest a mears taxi. It just makes things alot easier and you don't need to wait on other people. The taxi stations are readily accessible when you leave SW and UO. We never had to wait more than 5 minutes.