Have you considered doing a review of getglue.com? Potentially they’re the real missing ingredient to the ideas/stuff collecting. Like Springpad, you can relate your items to the picks of other people. More like foursquare or gowalla, rather than just collecting (or hoarding) ideas and stuff and looking them up after the fact, you “check-in” while enjoying certain activities. The items become the context for how you are spending your current time (rather than space which is how the location based services work.) So instead of saying, “Someone recommended ‘Community’ on TV. Let’s save it and come back to it some time” or “That looks like a nice bottle of wine, let’s clip it.” You would find yourself enjoying the bottle of wine, and “check-in” announcing essentially that you are currently enjoying (or not enjoying) that bottle of wine. And like the location-based counterparts, you could think of this as a conversation piece or simply keep the information to yourself and think of it as an experience journal (or something in between, if for example, you were curled up with a book, but just wanted those friends in your book club to get in on your experience). Although the categories are still limited, ultimately, you gain the same service that Springpadit offers: a storage of things you have come across that is leveraged through social networking through recommendations, buying options etc. And I would argue that it’s a lot more fun. Rather than just collecting things and using the social network as an enhancement, the getglue model is built from the get-go by gaming the shared experience.