My crew-guild
Insanity, is still pretty active in Midgard. There seems to be action virtually around the clock, sometimes you have to "jumpstart the pvp" by letting the enemy know you're there (e.g. taking their keep back for your realm, will flash a server-wide message for all 3 realms that someone from some realm took "this keep" in "this zone."
Although our current (active mains') lowest level is 44, most of us have recently made lower lvl alts to try out casters for a change, when the rest of the guild isn't doing anything.
Our alt chars are:
CapnCrunch Level 21 Spiritmaster and
Stringer Level 26 Runemaster. If you're just starting up and looking for a chill non-elitist group of players to run around with, let me know if you want to group up sometime.
Also for anyone interested in seeing how end-game PvP looks like:
http://www.youtube.com/watch?v=LKAUPv5bx3Q
Cya ingame!