For a small business, 100's of calls a day is above average. But, to your point, the call center I implemented it at had a configuration that did many thousands of calls a day going OUT of it. Perhaps inbound would be a problem (I honestly don't know), but we had 4 pri's hooked up to it and tapped them out 8 hours a day. For anyone who doesn't know the terminology, this is over 90 simultaneous calls. This involved much more than just placing calls - all the queues, auto dials and answering machine detection was going on at the same time. The server was a proper server - but I believe less than 2k (this was 2 years ago). I should note that Vicidial did have some mods to the core asterisk code to account for some issues - but these are things the average small business isn't going to encounter.

Anyway, I'm not trying to downplay the real announcement here - I think it's a very valuable type of service and definitely something a fair number of businesses need. I just had to defend Asterisk! :-)