Nintendo of Europe has posted a 2006 preview on their official website concerning Nintendo products and software. The European subsidiary says "in 2006 Nintendo will launch [Revolution]." While we know the Revolution will be released sometime in 2006 in both the US and Japan, no mention of a European date has been given. Given the fact that this announcement is posted on Nintendo of Europe's website, we can only assume they are implying a 2006 Euro release as well.
Pro G puts it best by saying: "I think we should wait until the words 'Revolution' and 'European release 2006' are used in the same sentence in an official statement by an Nintendo rep before we assume the Revolution will be coming to Europe in 2006, but we're hopeful."