Finally I got a nice laptop to work with. It is a new HP nx6110 laptop with Intel Mobile Centrino 1.7GHz, 512 RAM, 60 GB HDD and a whole bunch of stuff which is normally supplied with a laptop like wireless, bluetooth and so on.
Although this laptop does not belong to me, I can use it all the time, which is enough for me. My latest activities involve a lot of running here and there and in most of the cases I need a laptop for either having a nice repository of software nearby, connection to some tricky devices, backuping something or just to do some small tasks in the applications I run on the laptop. In addition I use it as a mobile development platform for small stuff I need to do.
I hope that one day I will buy my personal laptop, but until that this is enough.