Here is a list of ways blog publishers can chat with their visitors, and how visitors can chat amongst each other.
Also is asynchronous communication, ie. the different ways visitors can leave comments.
BLOG OWNERS CHATTING WITH VISITORS
Text Chat Box
Various…see my post Blog chat (this also includes visitors chatting with each other)
IM (same as text chatting but via your IM client)
mabber [ADDED 28/02/07]
Wambo [ADDED 28/02/07]
livechat2im [ADDED 16/05/07]
Yackpack Walkie Talkie [ADDED 16/05/07]…either a/synchronous
VISITORS LEAVING COMMENTS
Text Chat Box
See above…this is also a way to leave a comment
Send you an email:
FormLogix (Contact us)
There are a few from Google Widgets, not sure if they work:
Or you can use an email icon and have some mailto: code behind it.
hellodeo (not sure if visitors can leave a video comment)
flixn (not sure if visitors can leave a video comment)
bubbletwo [ADDED 17/01/07]
vidime [ADDED 18/01/07]
blipback [ADDED 15/10/07]
Commentt [ADDED 15/10/07]
Voice2Comment [ADDED: 27/01/07]
Jangl - a widget where people can call you or SMS you.
Also see YackPack Walkie talkie
Spinvox - ring a number, voice to text [ADDED: 2/06/07]
Speakageline - ring a number leave a voice message [ADDED: 2/06/07]
[ADDED: MobaTalk : Multimedia blog comments]
JS-Kit, there are so many polls…
[ADDED 13/06/07: A community or network around your blog]
[ADDED 4/06/08: Roundup : VoiceThread, Dipity, Ask500people, Intense Debate, Disqus]