For reference, some selected current market caps:
- Microsoft (MSFT) – $236.76B
- Apple (AAPL) – $183.40B
- Google (GOOG) – $173.97B
- IBM (IBM) – $159.93B
- Cisco (CSCO) – $138.60B
- Hewlett-Packard (HPQ) – $114.26B
- Intel (INTC) – $109.85B
- Disney (DIS) – $54.31B
- Nokia (NOK) – $48.24B
- Research In Motion (RIMM) – $37.43B
- Amazon (AMZN) – $40.34B
- Dell (DELL) – $29.63B
- Sony (SNE) – $29.10B
- Yahoo! (YHOO) – $24.78B
- Motorola (MOT) – $18.82B
- Adobe (ADBE) – $18.23B
- Palm (PALM) – $2.51B
- RealNetworks (RNWK) – $564.74M
The top 10 world-wide:
- Exxon Mobil Corporation 352.31B
- PetroChina Company Limited (ADR) 240.47B
- Microsoft Corporation 237.58B
- Petroleo Brasileiro SA (ADR) 220.19B
- BHP Billiton Limited (ADR) 204.30B
- HSBC Holdings plc (ADR) 199.98B
- China Mobile Ltd. (ADR) 199.09B
- Royal Dutch Shell plc (ADR) 195.76B
- Wal-Mart Stores, Inc. 195.27B
- Apple Inc. 183.57B
Steve Ballmer is not worried, Apple is just a rounding error.