What Bluetooth profiles does the iPad support?

Five Bluetooth profiles are supported in iPhone OS 3.0:

Advanced Audio Distribution Profile (A2DP)
Audio/Video Remote Control Profile (AVRCP)
Hands-Free Profile (HFP 1.5)
Personal Area Network Profile (PAN)
Phone Book Access Profile (PBAP)

The iPad currently supports Bluetooth 2.1 + EDR and runs iPhone OS 3.2.

Bluetooth 2.1 + EDR is backward compatible with 1.2 and supports data transfer speeds up to 3 Mbit/s. Features of this specification include:

Extended inquiry response (EIR)
Sniff subrating
Encryption pause/resume (EPR)
Secure simple pairing (SSP)
Near field communication (NFC) cooperation
Non-Automatically-Flushable Packet Boundary Flag (PBF)