As reported on DDO Europe:

The DDO server merge
We have some very important news for our players regarding the merging of the DDO servers.

Several of our players have asked for a server merge, particularly for our lower-population servers where finding a group can be more challenging. Couple this with new, increased capacity for concurrent users per server and we are now able to implement this for you!

Here's what we plan to do:

New Server Configuration
We'll eventually be merging our five current servers down into two new servers to be called "Keeper" and "Devourer". (Another two deities from the D&D® universe!)

Note: This server merge is only DDO Europe, the US Servers are not being merged

Head over to DDO Europe for the rest of the details on the server merge plan.

Sounds like a good move to help groups out.