Why wouldn't you want DIY conferencing?
I'm very much a DIY kind of person. In fact, if I can't order online, I tend to procrastinate and may not even order at all. Perhaps I'm a little anti-social, perhaps I just really want to do it myself, but I think it is more likely that I'm not very good at saying "no" to sales people. I can't tell you how many unnecessary extras I've ended up with by the time I hang up the phone.
But, even I can appreciate that there are some things that you really need an expert for. A reservationless audio, video, and web conference can get you through most of your day-to-day meeting requirements. Team meetings, project meetings, updates, meetings with clients, meetings with vendors, most of the time you don't need a meeting expert to get your message across.
Sometimes, however, how you present your message and the impression you make as the message is being delivered is so important that you don't want to leave it to chance. E.g. will someone be rustling paper in the background? Will someone have problems using the web conference? And how do I even dial out using a video conferencing system? (see my earlier post http://blog.actconferencing.com/post/2009/03/26/Ite28099s-all-about-the-meetinge280a6.aspx)