As noted on the forums by Famine, the changes are starting this week for the server merges.
They will be starting with the small servers it seems. Two low populated servers will be merged together. As well, this merger calls for complete shutdown of access for all players for all servers.
So, all US servers will be offline for the two servers being merged.
The first out of the gate are the US servers ‘Bloodspire’ and ‘Hyperborea’. It has even been noted to be an "extended" downtime.
Finally a free transfer will take place if anyone is not happy with the final server selection from these servers only.
I see this option being used heavily.
The oddest part of this notice is the news of opening "fresh" servers.
"Also after the merges are complete we will be opening up new ‘fresh start’ servers in both the US and EU territories. One each for PVE and PVP rulesets. Transfer will not be allowed to these servers after the merges. These new servers are designed to allow players to start afresh in a totally new environment should they wish to do so and forge a new community instead of joining one of the newly merged ones."
I do not comprehend the reasoning of this last notice, as the reason we have server merges is due to lower populations on some servers, so why create new servers to be empty of players?
Anyways, as more news comes of this, I will update this post..