On a mad sign-up frenzy recently, including:

• Postrank to filter down some of my RSS feeds in Google Reader/Feedly. It ranks posts based on popularity and seems to do a pretty good job. For example, my 30-a-day Sci-Fi Wire feed is now an 8-a-day “best of” feed instead.
• Friendfeed to aggegate all my feeds in one place. Not really looked into this properly yet but thought I should grab my namespace there before someone else does.
• LinkedIn to snoop on network with former work colleagues
• Getsatisfaction, a great real-time customer support site that seems to be used by a growing number of tech companies and app developers. I’ve logged a few requests with the Spotify team so we’ll see how that goes.