According to Yahoo News (and WSJ, only for subscribers – thanks to @Oswald for mentioning it on twitter, see also Reuters), the EU opens an in-depth probe to the Oracle-Sun deal.
According to the source, EU Competition Commisioner Neelie Kroes said:
„The (European) Commission has an obligation to ensure that customers would not face reduced choice or higher prices as a result of this takeover,“
Furthermore, the commision set a January 19, 2010 deadline for its decision, Yahoo News said.
PS: U.S. already approved the deal.