Seems that every month the magizines come out listing all the new bodies and all their wonderful specifications. Can't read any of that without lusting after a new one.
The sad fact is that none of them would improve my photos. My D90 is exactly the body I need. I mainly do wildlife and feel that I'm better off with my current lens selection and D90 than I would be with an FX body and starting all over with new lens.
I'll never be rich and famous, but I sure do have fun.