hi, i don't have my siemens phone yet, but i just ordered an m55. i've been looking into transferring files and one option that i've read about is scmxx, as mentioned at http://forums.gentoo.org/viewtopic.php?t=72549
. once i get my phone and usb cable, i'll give it a try. another thing i've seen is a filesystem that you can use to mount your phone called siefs. check it out at http://mirror01.users.i.com.ua/~dmitry_z/siefs/.
now, if you don't mind, hehe, please share your experiences so i know what to look out for when i get my m55. good luck.