I just tried this on my HTC Desire to maintain settings (especially SMS and home screens, which TItanium didn't for me) across a full wipe and it worked well. Thanks for your efforts in developing it and even more for making it free.
One suggestion though - would it be possible to make a 'full backup' option to do settings and apps together (personally I'm not bothered about 'Media'/photos as they reside on the SD card anyway and so are not lost across full wipes)? So the idea would be you could just do this 'full phone backup' before doing a full wipe and installing a new ROM, then restore this and have all your settings and apps as they were before. I know it isn't far off that at the moment (you just have to do one backup for "Applications (& Media)" and one for "Data") but if that could be added it would be perfect.
One suggestion though - would it be possible to make a 'full backup' option to do settings and apps together (personally I'm not bothered about 'Media'/photos as they reside on the SD card anyway and so are not lost across full wipes)? So the idea would be you could just do this 'full phone backup' before doing a full wipe and installing a new ROM, then restore this and have all your settings and apps as they were before. I know it isn't far off that at the moment (you just have to do one backup for "Applications (& Media)" and one for "Data") but if that could be added it would be perfect.