An iPAQ user decided, instead of going for one of the
more expensive choices, to take the cheaper HP iPAQ expandable case and turn it into a playthrough case (you have to traditionally pull the iPAQ out of the expandable case). Original idea, and very nicely done!
The site's hosted on GeoCities, so I've attached a couple of the pictures here in case the bandwidth is exceeded
This is the original case:

And this is the modded case:

More pictures and details of what he's done is on the above-linked site.