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 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 |