Particularly in light of the problems many have sufferred over the last few days, I want to state that I am very pleased with how well the planned router replacement/network tuning has seemed to go.
For every poster out there who claims, "Doh! This stuff isn't rocket science!" there are thousands of us who remain glad that the Dreamhost team handles these things for us. I'm sure there may be things still to be tweaked, nudged, and coddled back into place, but my sites and services are back up, my server load is down, and everything from my MySQL driven sites to the Control Panel seems to be working better.
We've all been quick to complain; it's only fair we recoginze when something works well.
Congratulations are in order to the Dreamhost team for the success of tonight's endeavor, and accomplishing all that within the predicted "downtime" window. Thanks!