My experience / tipps - hope they help a little along the way.
1 - Use Preferred Package Servers (PPS's), not push. A Pull is - by its nature - far less aggressive than a multicast, and I've yet to have experience justifiably "a lot of faith" in wireless networks. I regard them as fairly fragile, so I try to go easy on them.
The side-benefit is that peer-download will still work with this.
Though - I suppose one of the biggest questions here (of some importance) is - just how big a wireless network are we talking here? 10's of devices? 100's? 1,000's ?
2 - Use "dead periods" - use WOL to wake up devices and multicast the package out while everyone's at home / sleeping ... that should ensure that you don't disrupt anyone bar night owls.
Multicast isn't the answer to everything - in some situations, things like PPS's will work better for you - the details depend to a great deal on the detailed setup of your network / environment.
- Paul Hoffmann
LANDesk EMEA Technical Lead