Gelitsaki, are you sure that you can't take a flight on 26th? I tried it with ebookers and it was even a bit cheaper than 280 €. But i'm bad with those online-booking, so i don't know...

Jutti, if you will go to Sweden, then you can take a Silja Line or Viking Line boat from Stockholm to Helsinki. It shouldn't cost much more than 20 €.

Yvonne, how about you? and does anyone know about Annuli?