Posed group shots? Well, after a fashion. If you are ever involved in the cat herding process that is Photographing a Group, a tip: give people a few minutes to sort themselves out. Chances are, something will happen. It means letting go of the thought that you must organise things as quickly as possible because you have a schedule to keep and you don't want people getting bored and fed up - yep, by all means be ready and don't take an age once there is a group shot ready to take, but giving a moment for the group (who after all normally know one another well enough that, left to their own devices, they'll relax) to sort themselves out can pay dividends. It depends on your own personal style of course, but in my view the above shot will be of interest to the participants longer than the final version. Sure, you run the risk that the group won't be able to sort themselves out and you'll have to step in, but give them a chance - they all know what is required after all.
Also, though YMMV, I'd always recommend allowing those friends and relatives who want to take a picture to take one - where's the harm? Having control over this process might have meant something in the days when photographers made money through post-event print sales but does this ever happen any more? Chill out, let the event flow around you as much as possible, and don't sweat it if a dozen people show up with camera phones the moment you've got your group arranged - who cares? Goodwill and a relaxed wedding day are infinitely more important than you preventing 88 year old Aunt Jezebel getting her shot.