I would love to use my 770 & Maemomapper while out walking/cycling as a backup and, to make my life easy, would love it to display UK Ordnance Survey grid references. Is this possible?

I have taken a look at the Ordnanace Survey website and they have a description of how to convert lat/long to the grid refs here and there is even a CPAN module here which does the conversion.

Any ideas? Thanks,

-- Stuart