As *G you can reserve your seat in advance - with your KF/SK reservation code (which should be 6 digits amadeus one) just go to Lot.com and "check your reservation".
In-flight service in eco is the same as with SK, buy on board. Coffee and tea are free. In-flight menu is available here:
http://www.blue1.com/Tiedostot/Palve...ummer_2012.pdf