Putting this here:

Update on how to get a Somaliland visa / find the Somaliland embassy / permanent liaison office in Addis Ababa. This is probably the most convenient place for travelers to get the visa as overlanding from Addis (via Harar, Jijiga and Tog Wajaale) is easy and takes maybe 1-2 days, though Harar is worth stopping at properly. You can get the visa from London, Washington and possibly some other places as well. Posting because the 2013 Lonely Planet has the old location and most internet updates with the "new" location also have an old location (it has moved twice and may still move)

The office is off Namibia Avenue, which is incorrectly marked in the Lonely Planet as Cameroon St (Cameroon St becomes Namibia Avenue though). Coming from the direction of the airport, walk about 100 meters past the roundabout near Edna Mall (down Namibia Av) and you will see Sheger Building on your left and Helzer Mall (or building, can't remember) on your right. You turn right there. There is a sign at the beginning of this street. Keep walking down the street until you find another sign pointing you to the embassy. Then, knock on the gate as it's unlikely to be open.

To get a visa, you need a copy of your passport (luckily, there are 3 internet cafes that do copies for 1 birr in Sheger Bldg, Helzer Mall and in a shack on the corner on Namibia Av where you turn to get to the embassy), one passport photo and $70. I went there at 9:10 and was told that the ambassador would be in in 20 minutes. Had breakfast and came back at 10 and was issued a visa in about 30 minutes. There was no point to going any earlier because the people who got there before me got their visas at the same time as me (4 people applying that day plus someone negotiating with the ambassador about something)

For those people using the 2013 Lonely Planet, Edna Mall is not marked by itself but "Matti Cineplex" and "Farenheit" club are both in the mall, so you can find them. It's walkable from the airport (about 2km)