I want one of those bike trailer/stroller hybrid things. Any recommendations?

Even if the recommendation is "don't get that, get this other thing instead."

I'd like to be able to transport two children by bike, and have something that will work for a little while. In case you're not keeping track, that's currently a 2.5 year old and a 1 year old, who are both on the tall side.

So, internets, what do you think?