hellziggy

If you're using Firefox (which you SHOULD) you can download an LJ addon that does just that, expands all comments, even if they go on for many pages. And an even niftier feature is one which allows you to look behind a cut without going to a new page. Saves a lot of time and allows you to keep on scrolling down your friends page while pictures and such load within the previously cut area. Just go to Mozilla and search for Livejournal and it should pop up.