As this post already suggested, about a week ago I replaced my S40 with $title. (Yes, I know that S II is just released, but that pushed down the price of S a bit, and I don’t want to waste so much money for a phone.)
So far I’m quite pleased about the product, here are the tools I used to migrate data:
gammu, to convert the calendar to ics, which can be imported by the calendar
gammu2gcontacts to extract contacts from the gammu backup (earlier post)
mgmaps can export to kml, which can be imported to my maps
finally a throw-away (use once, and never look back) script to generate emails from my notes, which can be imported by gnotes
The hardware is supported by CyanogenMod, but I did not experiment with that so far. (bookmark)