also, if you want to use http browser anyway, just get RedGer
(it's free now
) and Opera 8.65. It works flawlessly
(I'm using it right now
) and you can open you gmail either mobile and html version. Just tipe m.gmail.com on your Opera address bar and hit ENTER.
After loading you email in mobile version, if you want a more sophisticated option, just go to the end of the page and click on "html version". Full Gmail on your Jornada screen