We've finished with the hardware upgrades.  Essentially we've added another 4G RAM and two CPUs to the mix.  As far as we know everything is more or less back to normal.  The big exception is the search facility; it'll return incomplete results for a little while until its database has been fully rebuilt.  If you see anything else that seems odd, please let us know.

We'll continue to make minor optimization tweaks over the next few days, but all should remain stable.