I'm a first day buyer of the 1st gen iPad and never considered exchanging it for the successor after only 1 year. I'm still totally happy with it, it's my everyday notebook-replacement for surfing and email.
1. I'm no fan of cameras in tablets or cellphones, I'd never videochat or take pictures with such a device. I'm not a snapshot-person and when I decide to take some pictures, I rather go with my big and heavy SLR - sorry, I'm a lens and image quality junkie.
2. Don't care for the faster processor, i think my iPad is very fast and I don't use it very much for 3d gaming.
The only advantage of the iPad 2 for me would be the HDMI adapter supporting full mirrored tv out (especially for surfing in safari), not only in selected applications. But I can live without that...