I have used PDAs for several years for reasons other than flying. My PDA connects to my home, or any other, wi-fi network just like a larger computer and accesses the internet with no problems. However, there are shortcomings due to the screen size and some internet pages do not display correctly if they are not written with handheld PCs in mind.
I suggest that you obtain the use of a PDA via a friend and check a few aviation web sites to ensure that the system is viable before you risk using it for navigation purposes.