Last week a German shop listed a Radeon HD 4890 from PowerColor for 237EUR and today Dutch webshop Salland started taking preorders for Radeon HD 4890 cards from Palit and PowerColor. The cards from Salland are a bit more expensive though, the shop offers them for 259.95EUR, while the slightly slower Radeon HD 4870 1GB can be bought for around 185EUR. Pricing will probably drop as more shops start offering the cards.
Both Radeon HD 4890 cards have a 850MHz GPU and 1GB of GDDR5 memory clocked at 3900MHz. Salland doesn't list the launch date, but according to a report from earlier today it might be as soon as April 2nd.