Ask YC: Virtual Phone System for my Startup

I'm launching my company and need a virtual phone system. At the start, I just need a local # that people can call and leave voicemail on. I'd like the voicemail messages to forward to my email address.

Eventually I'll need more PBX type features like call forwarding, extensions, fax, toll-free, etc...

What do people here use?

There's a lot of options out there. GotVMail seems most professional, but there's also Innoport, Ringcentral, etc...so what does Hacker News recommend?

P.S. Bonus points for companies with local Canadian numbers.