The first in a series of developer diary straight from the End of Nations development team here at Petroglyph, "MMORTS 101" starts with an overview of the game by Joe Bostic, Creative Director:

"What’s a massive world if it can’t hold a huge number of players? In EoN, we’re creating a world where thousands of players can play concurrently, something that has yet to be done successfully in previous MMORTS games. We haven’t reached a technical limit on the number of players on one map, but from a design standpoint, 50 players or so feels about right for the big test map we used. The game creates multiple copies of these public instances when some arbitrary playability threshold is met, much like the way Everquest II works. Private battlefields also create multiple instances, one for each group that enters, so the upper limit is more of a technical issue than a design issue."

Head over to Mmorpg.com to read the rest of the dev diary by Joe!