Sorry to sound confrontational but:

Why should we listen to startup advice from a startup that is still just a landing page and a mailing list signup?

You talk about MVPs and getting to launch, but you yourself have not launched... I'm confused.

Off topic, but you're building a like-system (I have a part-time hobby one I've been sort of working on too) and I just wanted to wonder how you decided to go ahead?

The biggest concern I had was that the market is saturated with solutions that don't work because of disinterest, and anything I made could be beaten well-enough by Facebook in a good week's work. Sure I had a couple of edges but I couldn't spot the edge that would fix everything, and when I found a local competitor (I live in a pretty small city with minimal startups) I was convinced that everyone must be working on this.

So.. long story short I'd love to hear how you decided this was the thing to work on and how (without giving too much away) you hope to overcome the problems for your product's sector.

Hard to argue with anything in this post except one thing: the fact that you made it in the first place. I really don't mean to be negative, but you should be building when you are blogging.

For the record:

as soon as possible != after you blog about it

a landing page != a MVP

lessons from the trenches != yet-to-be-launched

Please practice what you're preaching and get your MVP out there. Then blog about it. That's something I would want to read about.

"We are building an online social app that lets you stay on top of and enjoy anything that your friends find interesting, good, likable, cool, irresistible and noteworthy, or things they just liked for no reason. Of course, it's also a way for you to tell your friends what you like."

This description reminds me of Facebook.