I got mine for a multitude of reasons ....
First and foremost, I get lost on a fairly regular basis, though half the time it's just because I zone out and then lose track of what exit I just took.
But I wanted a GPS/Pocket PC solution.
I'm also using it as a Personal Information Manager now. I'm not sure how many contacts I can load into this thing (I'm using the Pocket Informant 5.6.1 add-on ... little nicer than the built-in Mobile 2003 programs), but I've got over 1,000 contacts at work on my computer. With Microsoft Voice command, I can input them into my PPC, hold down my record button (which I've programmed to instead activate voice command), and say "Show Crane Pumps," and boom, all my information for Crane Pumps comes up on the screen. Might not seem like much, but it's a big time saver rather than trying to remember 1,000 numbers or pulling up that excel spreadsheet every time. =)
I also loaded SPB Weather (along with SPB Pocket Plus) for my today screen, which downloads weather forecasts while sync'd up to my computer, so when I grab it on my way out the door each morning, I've already got my weather.
Along with that, I use AvantGo ... it's free, and it basically downloads the latest news from various websites and services (Yahoo, Reuters, Wired News, etc ....) onto your PPC. So each day it syncs up, and I have my news with me on my way out the door, which I can read at my earliest conveinence. And each day, it automatically gets rid out of date news articles and updates with new releases. I think it's very cool.
I'm finding more and more uses each day. In fact, I'm contemplating buying ANOTHER pda or two, I've already found so many uses. I just need a CF II slot along with this SD slot for a couple of things at work, and my g/f really loves taking mine along with her to the office, so she may need her own. =)
I'm looking at getting a Dell X50 for some work applications (basic 416Mhz version, but it has a PXA270 processor, which is the same as the 624Mhz version, so it should be able to run 624Mhz or above using XCPUScalar), and maybe an iPaq H2215 for my girlfriend. It has dual expansion slots, and with Sprint PCS's CF2301 compact flash modem, I can connect to their 1xRTT network on a service plan and have wireless internet ANYWHERE ... not just in hotspots.
Oh, and I also used my PDA to reset my router after I bungled up both computers last night and couldn't access the router over my wireless network through them anymore.
EDIT: Oh, I forgot to add ... when my girlfriend ignores me, my iPaq never lets me down! lol. But then, "Be my best friend!" hasn't been incorporated into voice command yet, so it's still got some improvements that could be made.
Seriously, I just re-read all those things. I've found more uses than I thought I would. The first day I had it I was thinking, "WOOHOO! FINALLLYYY! .... Now what ..." hehe.