Connections - we do indeed have Ryanair and easyJet but not that many destinations. Tallinn Airport has a good list[1] of what's available directly.
Salaries - we at Teleport (with deep Skype roots as well) just launched a salary comparison tool[2] this week, hope it helps to get an overview of salaries but also costs.
[1] http://www.tallinn-airport.ee/en/flight-info/destinations/ [2] https://teleport.org/salaries/
Another thing, that was not mentioned in the article, is that the government of Estonia seems to be doing a better job of managing the country than the governments of most other European countries. Estonia seems to have relatively little bureaucracy and relatively low taxes.
For example, I currently live in Norway. If I wanted to start a new company, it seems that it would be better for me to move to Estonia and start it there, rather than do it here in Norway. I wonder how feasible that would be to do, though, without me speaking Estonian? Other than talking to tech people, can you live in Estonia and get by with only English?
I guess there is more specific information for different backgrounds.