One thing that my company needs a lot is a basic resource scheduler.
Rooms, laptops, vehicles...If someone wants to reserve a vehicle, a laptop, and a room, then they must individually refer to three calendars, and then update those three calendars. A resource schedule would be great because then we could create event, select the resources, and done.
Yep, I'm backing this. It's quite easy to implement that feature: You just need the possibility to mark a contact as ressource. The only behavior this contact/ressource has to show (implemented server-side) is to behave as fruux user, but automatically accept all invitations. You can than plan/schedule any ressource you like to by inviting the ressource to your events.
Using the "availability" function of your client you then can check the bookings of the ressource.