Are there any phones/PDAs which can synchronise with Ubuntu nowadays?

[Chris G]

My wife currently uses a Palm Treo 6800 which she synchronises with
Evolution using gnome-pilot.

However the Treo 6800 is beginning to feel its age and we'll need a
replacement soon, is there *anything* currently available which can
offer the same sort of (relative) simplicity and ease of use?

All that's needed is a way to synchronise appointments and contacts
with a desktop application.  Alternatively I'm quite happy to install
a web application that a phone/PDA can synchronise with.  We
definitely *don't* want to synchronise with a 'cloud' server though.

Any/all ideas would be welcome.

-- 
Chris Green