I just wrote (or rather, enhanced) a small GreaseMonkey script that add's a BBCode (for all those bulletin boards) textarea containing a ready-to-paste image+link-code just below the normal HTML-Style link in the "All Sizes" views.
As the original script (written for another (in)famous image service) was greatfully released under the GPL, so I could use it as a starting point. I simply had to tweak some minor differences in the code to make it work with iPernity.
Link to the script file: http://www.dark-reality.de/stuff/ipernity_bbcode_generato.user.js
Of course, the new script is released under the GPL again (see note in the script file).