Was reading research report : meebo is the last year's most grown network ( i am not sure how correct it is as PR can make research reports ).
The first thing i did was going to www.meebo.com ,
Nice Gui, allowing me to login to a lot IM services without any registration to meebo and no software to install ( the all AJAX game )
My comments :=============
Impressed ? yep a bit, not on the technology, on the GUI
Why not on technology ? Because i one time worked on a gaim kind of project and we took all the reverse engineered libs and made applications except for googletalk ( google talk is XMPP ). So if we make a full application with the reverse eng: libs we dont have any control and its a pain in the neck when feature changes.
How to realize it with open software ?=======================================WOW you can do that.
Install ejabberd server ( http://ejabberd.jabber.ru/ ), take compnents from http://www.jabber.org/software/components.shtml
Install the required Gateway components and run.
Install http://jwchat.sourceforge.net/ and configure for ejabberd. Look http://ejabberd.jabber.ru/node/11 for details.
WOW with some installations and configs, your multi IM service is UP and running.
Now Job begins : GUI changes and customizations.
thatz a big job and meebo has done a very decent work on it. Way to go !!