The main complaint I have, and this is extremely vague, is that the design looks "amateur". It's minimalistic, but not because you've deliberately chosen to make it so, but rather, because you don't know what else to put on the page.

What I'd like to see would be: (1) a better header, and (2) some sort of sidebar explaining the site.

(1) The half-vignette at the top of the page is ruined by the placement of a blue logo in the line of focus. Lose the vignette, and expand the logo to fill the top of the page.

(2) A sidebar would serve the purpose of (a) explaining what the site is for, as it's not immediately clear from the domain name or scanning the page. I've been in the climbing community for ten years, and I have no idea what the slang "thrutched" is supposed to mean. You could also add a call to action like "Submit your climbing link!"

Finally, a pet peeve. Can you change "next page" to something else? It sounds too blog-like as it is.

That said, your site certainly looks a lot better than digg did in v1.