Lists of supported phones under Linux:

• by Syncevolution (great project to manage sync PIM data with Evolution, with nice interface): virtually all phones with syncml and bluetooth (or Internet connection to a syncml server)
• by OpenSync (frontends Kitchensync, Multisync): http://www.opensync.org/wiki/DeviceCompatibilityList
• by Gammu (frontend Wammu, probably soon Conduit): http://cihar.com/gammu/phonedb
• by Gnokii (frontend xgnokii aka gnokii-gui, gnapplet driver needed, AT method usable instead but less powerful): http://wiki.gnokii.org/index.php/Gnapplet_driver
• by Openobex (no known graphical frontend, but used to browse files with obexfs): http://dev.zuckschwerdt.org/openobex/wiki/SupportedDevices

Other projects:

• http://www.pietrobattiston.it/momail : S60 (mainly nokias)

If you know of some other project/list, please write me: toobaz [AT] email [DOT] it