So, you are a skilled professional and decided to work in Estonia. Where to start?
First, add you curriculum to the main Estonian job seeking websites:
A very good database of jobs of Estonia and the Baltics. You can add your CV and search for opportunities in English, as well as Estonian and Russian (for free). Plus, they have a very interesting feature for registered users: Salary Wizard! You select some options to describe your job position, put your current salary, and compare with others in the same categories anonymously, so you can see if you are making less than others in the same field!
A good job database for Estonia, with plenty information in English. CV Market started in year 2000 as a e-recruitment company in Estonia. Part of CV Market group, offers jobs also in Latvia, Lithuania, Czech, Netherlands, Hungary and Poland.
Some other options (harder, though) are the Labour Market Board, and to search in Estonian newspapers; Eesti Päevaleht group has the Hyppelaud, Eesti Ekspress has the EkspressJob. Be aware, it requires Estonian language.
Finally, the European Job Mobility Portal offers a high level database in all European languages, and its worth the visit. Maybe you find some good opportunities in Estonia there. As described in the website, "Job vacancies in 31 European countries, CVs from interested candidates, what you need to know about living and working abroad and much more brought to you by the EURES network."
You already know about the average salaries (bruto), but how much will you make? Estonia has a fixed income tax rate (21% in 2008), and you can calculate your neto salary, with all tax discounts in this Palga kalkulaator. Just type your bruto salary and click on 'Arvuta'. They explain in details your salary (in Estonian), how much goes for the government, etc.