Hey, Haiku on a phone has been discussed severall times on the IRC, sometimes on this forum.
I think it might be usefull to start some UX discussion about how a Haiku-stack powered UI could look like, by investigating previous UI/UX of other Systems, current and historical.
If this is done It would be a good idea to only do this with explicit code support of applications, that way nobody “just recompiles” stuff and complains that a desktop UI does not work on a phone, and only properly ported/written applications will be available.
I have a PSION series 3c I’d write a bit of a UI overview on, it might be usefull to do this for Android < 4 vanilla, android 4 htc, android “modern” (samsung UI, and the google one, maybe vanilla too), salifishOS, iOS, and maybe some of the linux on phone OS projects.
I’d tentatively call this effort project maple, like the brown leaf in the haiku logo : )