QuiteMike, I have used both Exbal and Loadbase, I second everything Eaglet and BignGreen said, without doubt Loadbase is my choice. It will run perfectly on your Axim X30, I use it on an OLD Axim X5 that's right an X5 (not an X50), and it runs perfectly. Plus in addition to having a huge reloading database built in (per Patagonia, not to replace reloading publications) you can store all of your own reloading data! This is what initially tipped the scale for me, (before I realized how comprehensive the ballistics are) you can even store images of your targets to go with the load data.
As BignGreen say's they listen to their customers. Patagonia customer service is second to none. I initially loaded it on my Desktop PC, but I had trouble with just a couple of features so I emailed PB, and within the hour they got back to me!!! We emailed back and forth a few times that evening, yes the same day, and determined that it was some outdated or corrupt software on my PC. PB asked if I could try it on another computer, so I loaded it on my laptop and it runs perfectly! So it is obviously a problem with my Desktop PC, but PB did not stop there, they had me send them some trace error data and continued to work on the problem for several day's even contacting Microsoft to try and figure out what is wrong with my PC!!! Now that is customer support!!
Although it is very comprehensive it is still easy to use, you have the OPTION to use the more complicated features (like multiple wind zones, Coriolis, Spin drift etc) or you can simply toggle them off. I used Exbal first and liked it, but Loadbase is definitely the way to go. The price for the desktop and handheld is about the same for both Exbal and Loadbase, but you get a whole lot more with Loadbase, not the least of which is fantastic customer support.