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to build a webbased application as a chat center
will be accessed by independent users, and join-group users
4 access type: super admin, group admin, join-group users, independent users
features: private chat, user queue, user rating, emoticon, avatar, typing status, send/receive time, openid registration and login, attachment, captcha on registration form, chat log searching
nodejs developers with nginx for chat engine background process are also welcomed