I haven't done what you're talking about, but it is straightforward to build your own system that runs on *any* portable device.  Simply create your inspection form as an HTML web page and have the Submit button send the results to your server or email in-box.   This gives you the advantages of being platform-agnostic (as much as I love my iPad 2 and the shares of AAPL that I bought back in 1997 at $4 each) and being able to customize/tweak for your specific needs.  And if you aren't HTML-saavy, this is a project a competent work study could pound out in a day or two.

If you want data collection/analysis, back-end processing can be tied to a database if you are sending the data to a server.  If you are emailing it to yourself (or others), you can use an AppleScript that will fire up automatically when the report hits your inbox and dump the data into a database or Excel.   Again, this is something that is really not that hard to do in-house.  For example, I describe how you can take email data into QuickBooks and do all sorts of stuff with it here: http: //www.ilpi.com/help/applescriptQB/scriptexamples4.html and it would be even easier in your case because you can tag the data before it gets to your inbox.  Heck, you could have the script set up an iCal reminder for the next inspection date.

Of course, if you are looking for something that has bells and whistles  then a commercial system is probably better.  Depends on your size and needs, obviously.

Rob Toreki