Not particularly, but my guildies are thankful & grateful for the opportunities they do recieve.
True; new maps, bosses, vanities or a new level cap would be a nice change, but in the meantime...

I suggest, (as a GM) in order to maintain guild activity: host your own types of events!

Not saying that you should have to create your own excitement, but why not rather than complain.
Also, holding your own events are not only fun for your guildies, but for yourself as well! ^.^