most of the ROM's built here are "generic" in a sense, in that as long as you allow your extended_rom customizations to run from your carrier, the CE update will work fine for your handset.
the ONE particular ROM you are reffering to was built specifically for that carrier, there was no bias, but that is the handset the individual owns and built a ROM for and decided to share with the community.
You may also want to take a look at the sticky, download the kitchen, and cook up your own if you are not satisfied with the diversity here and specifically target alltel users.
I hope you find something you like! You can also look at my own "Generic" ROM wich was recently updated using the new kitchen, as well as colonel & sarid have VERY good reputations for a stable and solid product.
If you need help, we are more than happy to point you in the right direction.
Good luck!
