That was the first address they were given, it assumes that they tried to use it from their homeworld. Not hard to imagine they'd try those addresses from offworld. Indeed it could be a good casus belli for the Aschen to seek war with Earth.
We didn't see their space capability, but I'd imagine it would be inferior, but their general tech level is probably still ahead of the Tau'ri.
I would have priority one for a future SG TL being the ability of the Tau'ri to build their own ZPMs. With a limitless supply of those they could easily build ships as powerful as the late Asgard ones, fully power up Atlantis, protect Earth and just generally improve living standards on the planet!
Here's a little senerio I've had in my head.
Earth, Alantis present day, lunchtime
Lab tech Bob "Dr. McCay!! Dr. McCay!! Come quick!"
McCay "What? What is it?"
Lab tech Bob " I entered ZPM production into the Ancient database search engine and look what I found! There a production site right here in Alantis, with instructions!"
McCay "..."
McCay " Bob, there are two paths from here. On path one I make your life a living hell, and you never work in the field again. In path two I make your life a cakewalk and you live happily ever after. Which do you choose..."
Lab tech Bob " errr, Two?"
McCay "Good choice Bob," taps communicator, "Shepard, get down here quick, I've found something you need to see!"
And yes, from there Golden Age ensues.
