One potential issue, it seems, is that developers may create applications for the Android operating system at a higher resolution and screen size than the Agora provides in its current form. Namely, for 3.2-inch displays with a 320x480-pixel resolution like on the T-Mobile G1 by HTC. It's a blow for anyone not sold on the G1, especially as the Agora offered an impressive feature set and would have been sold contract-free and unlocked for around $299.
The original specs of the Agora included a 2.5-inch display with a 320x240-pixel resolution, full QWERTY keyboard, a microSD slot for expanded memory, Bluetooth and FM radio. The Agora Pro upgraded to a 2-megapixel camera, Wi-Fi, and GPS.