It's official now - the Cubs have called up 1B-OF Micah Hoffpauir, C Koyie Hil, 3B Casey McGehee, and RHP Michael Wuertz from Iowa, and also activated RHPs Jon Lieber and Angel Guzman from the DL.  The final AAA stats for the four callups:

Hoffpauir - .362/.393/.752, 25 HR, 100 RBI in 290 AB

Hill - .275/.350/.492, 17 HR, 64 RBI in 364 AB

McGehee - .296/.345/.429, 12 HR, 92 RBI in 497 AB

Wuertz - 0-1, 3.60 ERA, 1.35 WHIP, 29 K in 20 IP

Interesting that Felix Pie won't be getting the call, especially since the Cubs have only 4 true outfielders on the roster right now.  Perhaps he'll be up later in September.  One other item of note - with the additions of Hill and McGehee, the Cubs now seem to have 41 players on the 40-man roster.  So, who got bumped?  (EDIT: Seems that Chad Fox was moved to the 60-day DL, meaning he's no longer on the 40-man and is officially done for the season.)