My favorite unofficial T-Mobile news site (TmoNews) has confirmation from a T-Mobile spy mentioning that they have some more positive confirmation from their forum stating so far (unless subject to change) the date is pretty much solid.

Mark your calendars Blackberry fans and Blackberry Curve owners wanting an upgrade… Unless there are things that delay the release… the date will be February 18, 2009. For those who don’t know how long that is… here’s a countdown clock for poops and giggles. Keep in mind, this is based on me being on Central Time (-6 GMT), if you’re on other parts of nation… Adjust accordingly!