Here is a way to contact them, its probably not the fastest way, but the only one i could find: http://studio.idg.se/info/redaktionen/. I think you should select “Nyhetstips(NewsTips)” in the “Ärende(Errand)” pulldown menu.
But it may be too late for them to review 1.5 for the upcoming issue, since its due april the 22th. But a little promotion never hurts
Taktik: u can also write email to inform@muzikus.cz , Muzikus is biggest magazine for musicians in slovak and czech republic, i am sure they can write some review for renoise 1.5
www.muzikus.cz
inform@muzikus.cz