Here is a link to the pdna pdf of the entire presentation for the McPier event center, data center, and Marquis hotel (not much new information on the hotel). Has some massing models, and some pretty detailed renderings of the data center - its apparently 12 stories and 270 feet tall.
Also has a some other renderings of developments in the south loop, like on Cullerton and Wabash, Cullerton and State (the Blue Star auto). It also shows the townhome development at 1900 S Calumet (plan and profiles).
http://r20.rs6.net/tn.jsp?f=0012CenB...2EuXFvtnqgVg==