25510 Web based download to Palm/PDA

Hi: I currently have a 100% web based system that service business owners like window washers, carpet cleaners, etc can log into and add prospects, customers, add appointments on to their schedule, etc, etc. So everything is stored in a mysql. I was wondering if it's possible to be able to take the information they insert into their webbased account and download it to their PDA/Palm Pilot if they want to. And visa versa-is it possible to insert info. into their PDA/Palm Pilot and then upload that data back into their program? If I'm not stating this correctly, can you let me know what information you would need to provide an accurate bid? I would just like to be able to offer my members the ability to upload/download between my 100% webbased system and a PDA/Palm Pilot. Thanks. Regards, Steve