Now, that’s a cool idea.

The important thing about BillMonk‘s execution of this idea is that they kept it simple. And they definitely have to keep it simple because I can’t imagine using anything complicated to keep track of a $5 burrito with extra sour cream.

As Michael Arrington wrote, the SMS thing is definitely cool, and I think important in keeping the site usable.

Now, they just have to be integrated with (or bought by) PayPal, and I’ll use it!

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