As it turns out, panoramas taken last October were just a test. Starting from June 19th, Regio is taking Street View images in Tallinn and other parts of Estonia.
There are several photos of Google cars on Delfi ( link) and Postimees ( link):
On Pae street ( Location on Google Maps)
5th Generation camera
In other news, Regio opened a non Street View panorama website 360.tallinn.ee.
Panoramas were created by panographer and web developer Andrei Bodrov (his 360cities account).