According to Mobile Tech Review, HTC has announced that the HTC Touch Diamond2 will be available later this month. So far, the release appears limited to Taiwan where it will sell for NT$21,900 (about US$650) with an included 8G memory card. The HTC web site makes no mention of any specific release date yet.
If the date does hold up, it is likely that other countries will see the HTC Touch Diamond2 around the same time. For example, Expansys UK shows a expected shipment date of April 15th. Even better, Expansys U.S. and Canada show an April 13th release date and a price of US$$574.99 and CA$759.99 respectively.
Meanwhile, Expansys UK is also showing the HTC Touch Pro2 with an expected release date of June 5th 2009 and a price of £514.99 (about US$750).