This has been mentioned a few times round the site but I thought I'd slip it in here This works really well with 'tabbed browsers' and works with ; text, pictures & smileys.
 
Simply put:
1. open comment box(in forum You want to comment in)
2. Find object in another tab that you want to add to Your post.
3. Hover mouse pointer over the object and hold down the left mouse button.
4. Without releasing the button, drag the pointer(& object) to the tab where Your 'comment box' is.(after a few seconds the tab will open)
5. Move the pointer down to where you what to embed the object and release the button.
6. Etiquette Whilst the object is in your comment box you can left click on it again and you will have the option to re-size the object to a suitable size

Drag n drop is also handy when quoting as it gives you a quick and easy way of identifying who You are quoting if you drab n drop their Avi next to the Reference: bit
ie.
Reference:(sorry Dec25 you were nearest on the 'active members' list)
 
I shrunk the Avi down to 23x23 to keep it readable yet discreet but you can scale to what ever You want, though scaling up generally results in the picture pixelating.
There is a Picture thread in the troll tank if You want to practice or in here , of course 
 
Enjoy