Smartphones: (Requires $29.99/$44.99 data plan for Smartphone) HTC Touch Pro 2 HTC Imagio Samsung Saga HTC Ozone Droid Eris (HTC) Droid (Motorola)
Blackberry: (Requires $29.99/$44.99 data plan for Blackberry) Storm 2 Tour Pearl Flip Curve
Advanced MM Devices: (Requires the Connect plan, or $9.99/$19.99 limited data plan) Samsung Rogue LGenV Touch
Phones NOT mentioned are considered "regular" phones and do not require a data plan, but can use the Connect or limited data plan.
The difference between the Connect plan for "Advanced Multi Media phones" (only 2 that require it and others are optional) and the $29.99 data plan required for Smartphones, PDA, Android, and BB devices, is the quality of the browsing capabilities of the phones, and the amount of data that is actually being transferred to and from your phone. You have a much richer experience with the BB/Smartphone/PDA devices.