Suggestion for BAM!

hi Willy, i manage a huge list of hosts with BAM, thanx for the good work, i's easy with it

i have only one suggestion :
- is it possible to add a system to manage groups of hosts
i would like to group some hosts to do special things
for example, i select a group and i decide to do a delayed detach of collatz project for all the hosts in this group
it will be a good idea to group hosts by cpu or gpu abilities for example too

what do you think about that ?