Unless I am mistaken, and anyone can feel free to correct me, but I think your problem is you are trying to mine off integrated graphics. You cannot do that.
Hmm.. seems to work here:
[2013-04-30 15:21:05] Platform 0 devices: 3
[2013-04-30 15:21:05] 0 Scrapper
[2013-04-30 15:21:05] 1 Pitcairn
[2013-04-30 15:21:05] 2 Pitcairn
[2013-04-30 15:21:05] GPU 0 AMD Radeon HD 7540D hardware monitoring enabled
[2013-04-30 15:21:05] Failed to ADL_Overdrive5_FanSpeedInfo_Get
[2013-04-30 15:21:05] GPU 1 AMD Radeon HD 7800 Series hardware monitoring enabled
[2013-04-30 15:21:05] GPU 2 AMD Radeon HD 7800 Series hardware monitoring enabled
[2013-04-30 15:21:05] 3 GPU devices max detected
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cgminer version 3.0.1 - Started: [2013-04-27 15:44:13]
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(5s):676.7M (avg):668.1Mh/s | A:37749 R:2148 HW:0 U:8.8/m WU:9.3/m
ST: 2 SS: 25 NB: 503 LW: 175248 GF: 1 RF: 0
Connected to ask.gxsnmp.org diff 1 with stratum as user
Block: 0142254c89ff10aa... Diff:10.1M Started: [14:57:55] Best share: 273K
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[P]ool management [G]PU management Settings [D]isplay options [Q]uit
GPU 0: 9.0C | 43.23M/42.93Mh/s | A: 2292 R:240 HW:0 U:0.53/m I: 8
GPU 1: 73.0C 2103RPM | 324.3M/312.6Mh/s | A:17747 R:934 HW:0 U:4.13/m I: 9
GPU 2: 72.0C 1724RPM | 316.1M/312.6Mh/s | A:17710 R:974 HW:0 U:4.12/m I: 9
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# 0 is on the motherboard.