The pictures of the HTC Desire that you can find on Google appear very much to be images of what has previously been known as the HTC Legend.
New Android HTC Desire shows up in pics | News | TechRadar UK
Not saying you're wrong mind - HTC could just be pissing about with product names in a move designed to confuse us!
Hope that we get the Passion and the Legend (although possibly under different names), as its nice segregation of the market. The legend only has the 600Mhz CPU and 256Mb of RAM from what I've seen floating round on the 'net about it. I'll stand to be corrected if anyone else has other information though!
http://www.brighthand.com/default.asp?newsID=16215&news=HTC+Legend+Google+An droid+OS+HTC+Sense