often, we got busy signal at night.But netzero has no busy signal normally.
I do not suggest AOL:
(1).I found they have used VPDN, sometimes, it will make you having no capacity of access some specific ports service.
(2).After 3 months, it's very difficult to cancel their service.
About netzero, I can give you a surprise about port 25 service. please email me: firstname.lastname@example.org.I can not announce it here.