I finally finished configuring my new Lenovo T61p laptop. I have used it for a week as my production development machine. It has 4 Gb of memory and I am running Vista 64 bits. I expected some issues when moving to Vista 64, bit it all was very smooth. The only issues I have had until so far are the VPN clients that I use to connect to our corporate network and to the networks of our clients. I created a virtual machine running on Windows XP that has all the VPN software. Works really well.
I am not doing any development directly on my host OS, so I don't have any experience with developing on the machine itself. All my development work is done in virtual machines. I just upgraded to version 6.0.3 of VMWare Workstation. I was always a fan of VMWare Workstation (I like cloning and teaming of the VMs), but the setup that I am running now really rocks! The virtual machines are performing very well. And loading / suspending them is much faster. I can now even run 2 SharePoint development machines at the same time, without my machine becoming extremely slow.
The images of my VMs are all on a separate disk, that I have in a bay in the DVD slot. If you are looking for a performance boost of your VMs, that probably is the easiest thing to do. For me, moving to a new laptop with 2Gb extra memory and Vista 64 bit also worked really well.
And what I lke about the Lenovo is the screen. It is the first laptop with a wide screen and I reallly like it.