A leaked Catalyst 8.91 driver (codename for Catalyst 11.11 Preview) contains references to a bunch of upcoming Radeon HD 7000 series parts. Additionally, the file also reveals some new codenames.
The relevant names are listed as follows:

AMD6778.1 = "AMD Radeon HD 7000 series"
AMD68FA.1 = "AMD Radeon HD 7300 Series"
AMD6850.1 = "AMD Radeon HD 7400 Series"
AMD6858.1 = "AMD Radeon HD 7400 Series"
AMD6859.1 = "AMD Radeon HD 7400 Series"
AMD677B.1 = "AMD Radeon HD 7400 Series"
AMD6772.1 = "AMD Radeon HD 7400A Series"
AMD675D.1 = "AMD Radeon HD 7500 Series"
AMD6742.1 = "AMD Radeon HD 7500/7600 Series"
AMD6841.7 = "AMD Radeon HD 7500M/7600M Series"
AMD675B.1 = "AMD Radeon HD 7600 Series"
AMD6751.1 = "AMD Radeon HD 7600A Series"
AMD6840.7 = "AMD Radeon HD 7600M Series"
AMD683B.1 = "CAPE VERDE PRO"
AMD683F.1 = "CAPE VERDE PRO"
AMD6839.1 = "CAPE VERDE XT"
AMD683D.1 = "CAPE VERDE XT"
AMD6838.1 = "CAPE VERDE XTX"
AMD682F.1 = "CHELSEA PRO"
AMD6824.1 = "CHELSEA XT"
AMD682D.1 = "CHELSEA XT"
AMD6831.1 = "GREAT WALL"
AMD6821.1 = "HEATHROW PRO"
AMD6827.1 = "HEATHROW PRO"
AMD6820.1 = "HEATHROW XT"
AMD6825.1 = "HEATHROW XT"
AMD6819.1 = "PITCAIRN PRO"
AMD6818.1 = "PITCAIRN XT"
AMD6799.1 = "SI NEW ZEALAND"
AMD679A.1 = "SI TAHITI PRO"
AMD6798.1 = "SI TAHITI XT"
AMD6830.1 = "SUMMER PALACE XT"
AMD9901.1 = "TRINITY DEVASTATOR DESKTOP"
AMD9904.1 = "TRINITY DEVASTATOR LITE DESKTOP"
AMD9903.2 = "TRINITY DEVASTATOR LITE MOBILE"
AMD9900.2 = "TRINITY DEVASTATOR MOBILE"
AMD9991.1 = "TRINITY SCRAPPER DESKTOP"
AMD9990.2 = "TRINITY SCRAPPER MOBILE"
AMD6800.1 = "WIMBLEDON XT"

Right off the bat, there are a string of Radeon HD 7000, containing Radeon HD 7300, 7400, 7500, and 7600 Series. For notebooks, HD 7500M and HD 7600M are listed. Also mentioned are HD 7400A and HD 7600A Series. "A" is a new suffix and might indicate integrated graphics for APUs. For Llano, the APUs contained suffixes of G for notebooks and D for desktops.