Bukkit

First - Allowing a way to let claims expire if the player hasn't logged on in (xx) amount of days would be exceedingly useful.

Second, regarding the grouped chunks - This one is more of a convenience for the lazy(me). If I have two bases, and I only want to add a player to one of them but not the other, I'd have to go through and add them to each chunk of that base - It'd be nice if there was a command that would add it to the chunk you're in, and every linked chunk you own.

Feature to add players to all your chunks was added, however grouping chunks may complicate the usage of the plugin which is not what I want.

As far as the expired chunks after X time, this is something I'm planning on implementing.