I hadn't even heard of those devices. I used to use Cyanogenmod on my G1, as 2.1 wasn't officially supported. I also put it on my HTC Desire but the need to do it became less when newer devices properly supported WiFi and Bluetooth tethering. I do not see how further fragmentation of the Android system (that is, additional markets) is a good thing when Amazon market / Google Play / endless Chinese markets are all around. Given the scope for malware in unchecked markets, another market and distributor surely isn't a good thing.

Additionally, what major phone manufacturers and carriers are going to go with this? If Android devices do not come with Google products (GMail / YouTube / Maps / Hangouts), are the devices as useful? I think not.