[Fritz]

Guild Limits I think 100 would be good limit. ALts do take away from the guild especially when they are in a different guild. In my last guild you couldn't have an alt in the guild unless you where a ceratin level. I believe that most of us will be playing more than one char. I believe the player needs to be focused on the guild no matter how many char's he/she has. So in this respect I think guild caps may hurt.
Multiple guilds I am , unless 1 is a player guild the other is like say a crafters guild or warriors guild that is game controlled (something that benefits your main profession). Also what Guild name would you carry? How would guild chat work if your in 2 or 3 guilds? Wonder if the will have some kind of guild status like EQ2? focused guilds - can be devopled can be developed by the guild charter. Or system of smaller grps whith in the Guild that are focus on a certain profession that would supply guilds needs (Sounds like a Feudal system).