I agree in someway with Shane but feel that it depends on what you consider a dashboards use.
Most dashboards are quite large in my experience and are not easily printed, exported, saved and certainly would be too large to drop to excel and email.
However, a carefully constructed dashboard gives you the ability to create what would be a custom report in any ERP system. More structured than a single chart or grid, but not overwhelmingly big.
Essentially I think the main use would be from making a simple A4 formatted report containing a handful of graphs, tables or gauges (think of a simple company overview - current stock level, current sales vs budget, 10 biggest orders yesterday etc as a one page view of yesterdays performance).
I made such a report in SSRS in my last company and while you could access it on the report server, it worked much better delivered to the users inbox as you naturally would open it and read it.
The trouble Phocas will have is how to restrict what dashboard would be email-able and what wouldn’t as too much and it’ll look garbage.