The 'Search' tool does a particularly good job of uncovering resources in posts on specific topics. I just found YC startup Hellofax from a search of HN posts by searching 'faxing'.

A wiki would be nice though- with a place for HN/YC sourced apps for any given solution.

Search is great when you already know what to look for -- but we don't always know what we should be looking for.

I would suggest adding a "vault" for every user, where he himself can bookmark or store those useful links and resources.

The wiki/aggregate idea was based on the fact that useful resources might be hiding in posts/comments.

Hiding them in vaults would clump them together, but the resources would still remain relatively hidden in the user vaults.

Apart from that, a wiki has the added value of organization and summary (a short description or other considerations).

There might be better ways to accomplish this task, though.