The site plan was released today for the Homewood Suites at East Avenue. The elevations are at the bottom of the file. The elevations show the main roof to be 151.95 feet. Behind that is the mechanical penthouse which I measured out to be approximately 12.59 feet, so a total of 164.54 feet tall.
The elevations also give some sense of what the facade will look like. They're planning some diagonal cross designs on the garage and penthouse.
The address is listed as 80 East Avenue.
ftp://ftp.ci.austin.tx.us/ATD_AULCC/...enue_PLANS.pdf
This is the architecture firm, but I didn't see any renderings listed.
http://www.westeastdesign.com/