I have a ton of apps running on my old slices. A client pays monthly for the one slice and it really doesn't look like it will cover costs with the shift to their 'cloud' servers. I really don't want to have to go and reconfigure several versions of python and django and several apps. I don't want to migrate databases. I don't want to move various processes that have been running without being touched for 3-5 years.
The email doesn't give us any indication of the migration path. I don't care about your IPv6 problems or your OpenStack announcements.
Even something like domains hasn't been addressed. I use the slicehost interface to manage a dozen or so domains and their subdomains. Am I going to have to shift nameservers and reconfigure these domains?
Read their initial announcement to gain some perspective on how the acquisition was described.
"Our number one goal is to continue delivering the Slicehost experience. In fact, we hope to make it even better." http://www.slicehost.com/rackspace