I did one of those seedy middle-of-the-night moves with this site recently. Like Dave Burke, I switched to a Virtual Private Server and I agree - there is no going back to shared hosting now! Hopefully you did not notice any interruption in service.
Since it actually did take about 24-hours for DNS changes to take affect there may be a few issues with a comment or trackback or two that were recorded on the old site/server and not on the new one - I'll review the old database one last time as part of my final goodbye to WH4L. I guess I could have been smarter and left the site running on the old database until the DNS replication was complete, but I didn't even thing about it until now. To tell you the truth I didn't think the DNS changes would take that long. It didn't for most of the other domains (my wife's and kids' vanity domains), but danhounshell.com seemed to be cached a little more than those.
In any case I am really tickled with my new setup and everything seems to be running well.