Well i was originally looking for a game similar to stronghold when i stumbled upon this, SH3 coming up sometime this year i can't wait for that either.
DoF looks similar in the whole sieging part but the building part will be much different, Im sure i will play both for different reasons. This for the whole MMO online RTS run my kingdom thing and SH3 for my more "No magic" type castle sim, no elves and that. This looks like it will be a great game and i hope i get into the open beta so i can help test it out. I have been looking for an RTS game i can really "get into" and become a pro, SC2 Dawn of war 2 etc just aren't my thing. But this might just be the one