Sony Europe has categorically denied to Eurogamer that it has a press conference scheduled for next week.

Rumours erupted yesterday that the platform holder had a "Big Bang" meeting planned for next Friday, which speculation suggested could be about a new 40GB PS3 model.
However, a spokesperson for Sony told us it has not announced anything and has nothing of the sort planned.
http://www.eurogamer.net/article.php?article_id=84613