Reasonable PBX service

I read about Phone.com today which is a hosted PBX service, a PBX being an automated phone system that allows routing of calls, digital receptionist, hold music etc. This is a great solution for a small business that doesn't have the framework to host a PBX system, even though Trixbox is an Awesome system to have. It seems reasonable for pricing.

Another option I have looked into was using Skype as a PBX. There are a couple of extensions for Skype that allow this but at the same time if there is a nice Web GUI for Phone.com and no dependency on local software, then that would be ideal for small businesses.