I shoved Minimo on my Nokia N800 and got Bongo running on it. It is very very slow, and Bongo does look a little weird, but here are some screenshots:

Note the lack of scroll-bar meaning the lower section of the logon window is missing. This doesn't matter as it is not needed at all.

This all looks nice apart from the weird drop-down box to select from Summary, Mail and Calendar. Still, it works.

Composing a new mail. Looks good.

Calendar month view. Looks good.

This is no great surprise that it worked as it's the same Mozilla code, but cut-down. However, it's nice to have access to Bongo on another portable device.