Visitors to this blog who are translators and are able to read both Finnish and Swedish will find quite a few useful reviews on the Kiiltomato / Lysmasken website. If you are not sure whether the latest work by some known or unknown author may be worth translating, you can search there for reviews. Both Olli Jalonen's and Heidi von Wright's latest works feature.
The website dates back to 2000, so there are a large number of reviews already available. And not only of Finnish or Nordic literature. You can see reviews of works by such authors as Le Clézio, Lispector, Reich-Ranicki, Turgenev, Pessoa, C.S. Lewis, Pirandello, Yourcenar, Kertész, etc., when these have been translated into either Finnish or Swedish.