I use OneBox (www.onebox.com). I also looked into GotVMail but when comparing the two, found that OneBox offered the same services as GotVMail at a cheaper rate. OneBox charges $49.95 for 2000 minutes, while GotVMail charges $99.95 for the same amount. OneBox even has a Conference Center, allowing conference calls for up tp 32 people, a feature not available on GotVMail.