I may have stumbled on a new angle for BlackBerry users to explore. It's slightly involved, and needs some refining, but it may interest some, and those some may know more than me in areas that would improve it...
GPX spinner does a beautiful job of outputting the GPX file in a very readable and usable format, in HTML. The problem with MobiPocket is that it will only import one HTML file at a time, and it seems to be the only reader for BlackBerry that is worth its salt. GPX Spinner, of course, exports a folder full of HTML and GIF files, rather than a single HTML file.
I've approached it from the Windows Help File angle: Mobi Reader (NOTE: NOT Mobi Creator), as it happens, will import a CHM file (a windows compiled HTML help file). And you can use the freely available Microsoft HTML Help Workshop software to compile a single CHM file out of the folder that GPX Spinner spits out. You just create a new project, point it at the folder that GPX Spinner created, set index.html as the starting page, and compile. Done.
However, this is where my limited expertise needs some help from someone who is proficient (or who has the ability to become proficient) in the use of the Help Workshop software: HTML Help Workshop will spit out a CHM file that works fine if you just double-click it (it opens in windows help file mode). This in itself may be a nice solution for laptop-toting cachers. However, Mobipocket, during its import of a CHM file, requires the CHM file to have a Table of Contents. Which you can set up in Help Workshop. But I'm stuffed if I can work out exactly how. I've fiddled around, and added one or two pages to the Table of Contents, and when I import into MobiPocket Reader, those pages come out fine and look pretty good on the Blackberry (images and all), but only those pages that I've added to the TOC are there. There must be a quick way to spawn a TOC for the whole set of HTML files by drawing on the HTML links that GPX spinner so nicely produces. Help, somebody?
Another angle I've looked at is using a piece of software called CHM Magic, which converts the CHM file (with no TOC required) into a VERY NICE PDF document, all links and images intact. I took this approach because Mobi also imports PDFs. But then Mobi completely ballses it up, formatting goes out the window, links become inaccurate, and images look [potty language euphemism deleted by moderator]. (Even exporting the resulting PDF to Adobe Reader for Palm OS is no good, because hyperlinks are not maintained, and a static document results.)
So, if anyone has a bent towards obscure and somewhat poorly documented Microsoft software, and feels they could work out the TOC thing, I'd love to hear from you, and we could have something for desperate "I don't care, I'll do anything! ANYTHING!" BlackBerry users who don't mind a bit of messing around with multiple formats.
Peace
Shagz