Stock coolers are a waste -- there are much nicer (quieter) alternatives available, and at minimal expense. I never use the stock coolers. It's long seemed a bit silly to me that you couldn't buy the CPU without getting the cooler along with it, so I'm pleased that they're leaving the choice to those building the systems.
They're well worth a subscription, though if you're at a university you can probably see them for free. They both have very good online versions. These are the sources that most online stories reference, and they're quite readable -- though the papers can be a bit challenging. The format is a combination of news, review articles, and peer-reviewed papers. Issues come out weekly.
One thing that concerns me is the fixed maximum number of bitcoins. Lets say people acquire bitcoins, but the amount isn't enough to worry about, so they never use them, or perhaps their computer crashes and they don't have a backup. My understanding is that these bitcoins are permanently lost from the economy of bitcoins. Over time, the total supply would begin to dwindle, presumably pushing up the value of those that remain, until people become frustrated at the small supply and are motivated to move to a new system, then bitcoin is abandoned. In the real world this happens with dollar bills, but the government can compensate for this by creating more. Is this issue addressed in some fashion.