The most up to date and comprehensive source on PISA, including access to national reports of participating countries, OECD PISA pages.
Regarding Finnish students’ performance in PISA, only the report on PISA 2006 has been published in full in English as PISA06 FINLAND. Analyses, Reflections and Explanations. Results of PISA 2000 and 2003 have been reported in full only in Finnish but a foreshortened version of the report on PISA 2000 The Finnish Success in PISA – and Some Reasons Behind It is also available in English.
The Finnish Education System and PISA published by the Ministry of Education and Culture in 2009, combines a short description of the Finnish education system and the results of PISA 2006.