And the first iteration for 2.6.0 is here

It allows a "shoutbox" to be placed anywhere on your website. This allows members to chat quickly, rather than making posts. This is NOT designed to be a chat-system, but is somewhere in-between posting, and realtime chat.
Installation
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1) Modify YaBB files using BoardMod or manually.
2) Upload modified and ShoutBox files their respective locations on your server in ASCII mode. ( ShoutDisplay.pl should be chmod 755, or the same as YaBB.pl)
3) Upload the Shoutbox folder and graphics to the ModImages directory in Binary mode.
4) Go to 'Admin Center - ShoutBox' to set your options.

Files to edit
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AdminIndex.pl
Admin/AdminSublist.pm
Admin/ModList.pm
Languages/English/Error.lng
Sources/Palette.pm
Sources/Profile.pm
Sources/Register.pm
Sources/SubList.pm
Sources/System.pm
Templates/default/BoardIndex.template
Templates/default/MyProfiles.template