One thing that I find handy is an ability to link to a specific post when I'm replying somewhere else. This is particularly handy when Ken has mentioned an info-nugget in one thread that would be helpful to answer a question in another thread. (Like I just did here.)

Copying to a thread or even a page in a thread is easily done by copying from the address bar, but the only way I've figured out to link to a post is by modifying this path:
http://dvdprofiler.com/Forums.aspx?task=viewtopic&topicid=[TOPIC]&PageNum=[PAGE]&x=#M[MESSAGE]

Can we get a button for this? 

I have occasionaly used the manual method to create a message URL manualy. I would welcome a button.