If, like me, you are the proud owner of a Sony Erricsson T610 mobile then why not try this excellent tool to connect your phone to your PC: http://fma.sourceforge.net/
Also if you want to access the internet via your mobile GPRS you can monitor your call costs using Magitime: http://www.geocities.com/magistone/welcome.htm
And if you want some java apps for your phone visit: http://www.getjar.com/ or http://midlet.org