Supposedly there's at least two, the myTouch 3G HD that we've seen leaked renders of and the HTC qwerty slider we've seen actual prototype shots of, as well as a product shot.
myTouch 3G HDSupposedly
Unamed HTC QWERTY SliderSupposedly
One of these is supposed to be launching in September, while the other is supposed to be launching in November (Project Emerald). One of these phones, whichever project emerald is I guess, is supposed to have a dual core Snapdragon proccessor. The qwerty is said to have a 3.7" screen and it looks like the myTouch HD could be 4"+ from the render.
BTW, I think the "Glacier" code name is a joke to throw people off by whoever posted the benchmarks and the test site.