Another good tool I've found for evaluating your 
web site (in terms of usability/navigation) is 
Nielsen's 10 heuristics.  You can find them 
online at:

http://www.useit.com/papers/heuristic/heuristic_li
st.html 

If you are really bored and want to read a pretty 
good book on how to re-design your site, a book 
called Contextual Design (forgot the authors) was 
pretty good.  If anyone wants some help on 
usability/navigation on their website I'd be 
happy to help out.  Usability,navigation and load 
time are the 3 most important factors when I 
design a site.  Right now I'm in the process of 
re-doing my site to make it a little more 
pleasing to the eye and improve the navigation ^^

-Another annoying part of poorly designed 
websites (imho) is poorly chosen backgrounds.  
For people using dial-ups I know this can be 
murder on them!  I've seen a lot of sites where 
they tile the background and it obscures the 
text.