For anyone who is interested, here is the latest data (csv) from the App Store, as of this morning. Looks like just over 24,000 applications are currently available.
The most popular premium applications (applications that cost more than $9.99)
| IM+ v2.0 | Social Networking | SHAPE Services | $9.99 |
| Things | Productivity | Cultured Code | $9.99 |
| Todo | Productivity | Appigo | $9.99 |
| 100+ Great Books for Ten Bucks! | Book | BeamItDown Software | $9.99 |
| Lonely Planet Mandarin Phrasebook | Travel | Lonely Planet Publications Pty Ltd | $9.99 |
| Netters Anatomy Flash Cards | Medical | Modality Inc. | $39.99 |
| MLB.com At Bat 2009 | Sports | MLB.com | $9.99 |
| iBird Explorer Plus | Reference | Mitch Waite Group | $19.99 |
| ReaddleDocs | Business | Readdle | $9.99 |
| BeejiveIM - Instant Messaging Anywhere | Social Networking | Beejive Inc. | $9.99 |
The most popular inexpensive applications (applications that cost less than $4.99)
| Flick Fishing | Games | Freeverse Inc. | $0.99 |
| Touch Scan Pro | Entertainment | Gary Fung | $0.99 |
| Diagnosaurus DDx | Medical | Unbound Medicine Inc. | $0.99 |
| Flight Control | Games | Firemint | $0.99 |
| Amazing X-Ray FX | Entertainment | WebArtisan | $0.99 |
| Night Stand | Utilities | SpoonJuice | $1.99 |
| Pocket God | Entertainment | Bolt Creative | $0.99 |
| Medical Calculator | Medical | MarketWall.com | $0.99 |
| ColorSplash | Photography | Hendrik Kueck | $1.99 |
| Ocarina | Music | Smule | $0.99 |
