Two bases: Founded in the town of Jyväskylä, but with the newer office in Espoo (next to Helsinki) having grown to the same size; something just under twenty people at each location at the moment, I think.
Specialises in DW / BI projects (which is what I am going to do), especially at the Espoo office; also a .NET practice, at Jyväskylä, which apparently grew out of the Delphi business the company once began with, but which is now of declining importance to the bottom line (sigh).
(And, as I mentioned to Amy, the "Oy" in the name has nothing to do with Jiddisch or the Mosaic faith, in case that's what you were wondering. :-)