HD or not HD?
We put in a LifeSize system here in the UK to speak to our colonial cousins in the US a couple of years ago. It wasn't cheap (£10k each end) but it works pretty well over ADSL though you'd be hard pressed to call it HD quality; having said that, the faster your link, the better it is. The benefit for us was IP meant no need for loads of concurrent international ISDN calls and the reduction in flights over the Atlantic so it's definitely paid for itself. YMMV...
