I think this is an idea with a lot of potential. Rather than importing your blog, I'd focus on being the weebly.com of mobile.

A couple more notes, from using the product:

Deleting an element pops up an incredibly annoying confirm box. Offer undo instead; confirm boxes are almost never the right choice.

You have a captcha on signup. That will reduce the total number of accounts created. You're not big yet; add it when you're a valuable spam target.

I'm not sure what I can build that's useful with this. Show me some examples of awesome mobile webpages I can copy.