3CX just released v10 SP1 and it is fantastic.  With v10 3CX combined the workstation application 3CX Assistant and the My Phone web portal into a Silverlight 3CX My Phone which can be run as a web portal or a Silverlight app.  It is just so easy.  This week I was on a call with a vendor who needed to conference another party in on our call but she said her system wouldn't permit it.  Never having needed to set up a conference call on my 3CX system before I said I would try.  Unbelievable - it is all done through the graphical interface.

3CX v10 includes an optional full Call Center offering.  

This system scales up to considerable size now and should be the perfect candidate for almost any business.