Here's what you can do to help the incoming tide of questions you think might be duplicate:
Look on the sidebar of the new question, more than likely the master question is there already so you can easily find it.
Toss the question title into google and you'll probably find the master question near the top.
Doing 2 can be hard, especially with new users and poor titles like "ubuntu 13.04 install", so if you help retitle questions to make more sense this helps humans find the duplicates too.
Keep leaving "possible duplicate" comments in questions, even if you don't have close votes, the site uses crosslinking to determine FAQs, and more importantly we have a search query that mines for those comments on open questions so people can vote on them.
We have a master list of dupes somewhere but it becomes as useless as a normal list question does on the site, people are excited about it at first and then stop maintaining it. Searching is more effective for me.
Even though bug reports are offtopic we always get swamped with them at release, so it'll be a bit until we catch up, so the best we can do is keep combing through the list and doing the best we can.
We should probably keep the Skype one open since it's getting so many hits, and then close it later - that's what we did for the nvidia headers question last cycle, sometimes an issue is so popular that it makes more sense for us to have one sign post for a while instead of multiple incoming questions of the same topic.