Right now, the guild member-limit is 100. The guild I am in (Gamer Girls) has reached this limit and we have been forced to create a supplementary guild (More Gamer Girls) to work around this. While this is not a common request, since most guilds will not reach this limit, we, and eventually any other guilds who exhaust the limit, would appreciate the limit be raised.
Changing the limit to 200 is a good start, but could conceivably be reached soon as well. If we're picking a number, 500 should be fine. I hope this suggestion isn't too difficult to implement.
We've been really enjoying Spiral Knights so far and look forward to more content in the future!
Please do this. I've had to kick like 25-50 people already just so I could have some new T3 people come in...