Thanks so much, guys. You've been a big help. Right now I have my options narrowed down to two. First, my wife is going to check her work e-mail account for e-mails from Palm. Being an employee of the school system, she gets great deals on new/used/over-stocked PDAs since all of her fellow psychologist use them.
The other option is going out shopping for a really nice paper organizer. My main concerns, which I hadn't thought about until you guys brought it up (thanks!), are screen size (pop is starting to get to the point where he could use a pair of glasses) and back up issues. My dad does NOT have a secretary. He has a son that is the Retail Office Manager that gets treated like a secretary at times
Oh, and a little background information about our business for anyone that wants to know: Our family owns one of the oldest swimming pool construction businesses in our area. Sounds funny for Indiana, but if you have ever passed through in the summer, then you know it's horribly muggy and hot

Anyway, my father has been the prez of the company for about 10 or 15 years now. He is in charge of the actual installation (a 6 or 7 day a week job). Up until about the beginning of the summer, my somewhat retired grandfather made the actual sales calls. However, he bowed out of that and left that to my father. So, you see, my father keeping potential customer info at hand is vital to the business. Losing a post-it note could mean the difference between getting and not getting a $20,000-$40,000 job

More pointless background info: The vice prez of the company is my uncle. He runs the service end of the business as well as liner replacement. Yours truly, runs the retail end of things at both our stores/customer service/troubleshooting/advertising/foot-in-the-door-sales
Anyway, thanks again, guys. It is very appreciated.
Jake