I've had mixed results using a variety of browers on the Palm OS. I've used several Smartphones like the Samsung I-300 and the Kyocera 7135 and simply used a browser to update my weblog.
The biggest hurdle though is re-building. I haven't found a browser yet that can handle the pop-up windows that MT insists on using. I suppose you could dis-able those through hacking, but I'm hoping someone will come up with a better solution.
Err... nevermind, I just re-read your post and you were looking for a solution for your users, not for you to edit. Nevermind.