On the MacPorts side, I know that at least Saagar Jha (who posts on HN often) did indeed have a DTK. Perhaps consequently (?), MacPorts does support ARM right now.
I have very little to do with MacPorts's ARM support, I'm not even a maintainer ;) Most of that infrastructure was already there from the PowerPC→Intel transition, and Apple engineers had patches for basic support ready fairly quickly. I worked a little bit on early support for some heavily-depended-on packages, but I wasn't really directly involved in the effort.
Whooops! I only mentioned you because I remembered you were listed on MacPorts's website until recently, as a contact for "Apple DTK issues" or something like that.