Hello, is that possible to use zaurus c3000's keyboard remotely from pc or other devices via bluetooth or wireless?

You mean use the Z's keyboard as input to another machine? That's easy to do. Take a look at SSH or VNC (VNC or remote desktop if you're dealing with Windows). All of them are easy to set up; just Google for how-tos.

HTH

umm yes i want to use z's keyboard as input to another machine. but its not a pc i want to use it with my ps3. ill just try if its works can be nice

I don't think it'll work with a PS3 other than with PS3 Linux, but you never know.

Best of luck!