Yep. As of Rls 5.0 the CS1000S designation will go away. The new one is called a CS1000E Standard availability. THis basically means it has one core, the high availability will have two cores like the large option switches.
It's actually a pretty good thing overall. Nortel has streamlined their products and not made ridiculous price increases. The CS1000E will now be able to support up to 50 MG1000E gateways. This increases the total supported ports to 22,500 IP stations and 5000 TDM ports, configuations may affect this total, but this is the Nortel stated totals on the new release.
You can also have multiple survivable MG1000E gateways where all of the cards in the MG1000E are protected, not just the IP equipment.
There are a ton of improvements and available options with this new release. I went to a five day engineering workshop on it and every day was jammed with info on new stuff.