Hi there, long time reader, first time poster.
I think the addition of a "random button" for navigating the comics would be a great and (relatively) simple addition to the web site. You know, you click it and it takes you to a random comic.
A lot of times I'd like to look back at older comics, not necessarily specific ones, and navigating back from the current comic (or forward from the original comic) is very time consuming and to have to do it every time I want to look at older comics is a pain.
The way the URL of the comics is set up makes it difficult to navigate to a random point in the comic because the pages are not just sequentially numbered but also include a date mark in the URL e.g. if I wanted to go to a random spot and they were just sequentially numbered I could simply go to www.pennyarcade.com/comic/#
where '#' is the comic number, but as it is I have to know on what date a given comic was written to view it this way.
Just my two cents