BuddyPress.org

The best thing is that I didn’t have to change the plugin at all!

Install this as a Sitewide/Network plugin: http://wordpress.org/extend/plugins/comment-form-quicktags/

Edit activity/post-form.php

Look for

<div id="whats-new-content">

<div id="whats-new-textarea">

Replace with

<div id="quicktags"><script type="text/javascript">edToolbar();</script></div>

<div id="whats-new-content">

<div id="whats-new-textarea">

Then add this to the bottom (below </form><!-- #whats-new-form -->):

script type="text/javascript">var edCanvas = document.getElementById('whats-new');</script>

That’s it. It works.

Running: BuddyPress 1.2.3, WordPress 3.0, My theme plus the BuddyPress Template Pack.