<EDIT> OK there is an RSS feed. If making a widget out of that will do I would consider it. It is important to note though I should not be your first choice. I know html, css, and javascript but I am not a UI designer. Someone with web design and graphics experience could do a much better job than me.
Leaving my initial ramblings below...
</EDIT>
There is not an RSS feed in the forums as near as I can tell which complicates things significantly. You could use the "latest threads" on the front page I suppose. Alternatively you could authenticate and gut the get new display. Neither of these are going to yield very good results though since the whole widget is still basically just a cascading style sheet and some JavaScript.
Do not take this as an intent to write the widget by the way. Right now I try hard to find things to do in my spare time that does not involve coding, not the reverse. (I do code in my spare time but I am trying to cut back.)
If an RSS feed is made available though or some other XML format I might consider it. At that stage the widget actually is fairly trivial. There are others here who are more capable than I at web design though, which is what is really required.
P.S. For Widgets I would not worry about a lack of programming experience. Widget design often does not really involve "programming," just a bit of html and javascript. You can use cocoa, but most widgets of this nature don't need it.