  Compton scattering is one of the few spectroscopies which directly probes the
ground state momentum density in materials. Recent progress in synchrotron
light sources has brought a renewed interest in the technique as a tool for
investigating fermiology related issues on the one hand, and as a unique window
on hitherto inaccessible correlation effects in the electron gas on the other.
We provide an overview of some of our recent work on a variety of metals and
disordered alloys, including Li, $\rm Li_{1-x}Mg_x$, Be, Cu, $\rm
Ni_{75}Cu_{25}$, $\rm Ni_{75}Co_{25}$, Al and Al-Li.
