Sony Ericsson Xperia X10 :: Keyboard Application That Is Like Normal Alphanumeric Layout On Phone Keypads

I have just purchased the X10 handset and on a whole I'm really pleased with it. My previous handset was an N97 - rubbish! Anyway, since playing with the phone, could you answer these for me as I'm new to Android and don't really know what I'm doing.

1) On the mentu's, text screen, etc. It has a blue background and white writing. Is there anyway to change this? I have an eye condition and blue isn't the best colour for me to read from. I was looking for something like theme settings but there isn't one.

2) Is there a keyboard application that is like the normal alphanumeric layout on phone keypads ie to get the letter b you press the number 2 twice. I believe the HTC Desire has this option and old Nokia N97 that the feature.

3) I've read on another thread about the ringing volume and earpiece volume being low and turning up the volume to max makes the earpiece sounds quality pop/crackle. I've experienced this too but does anyone know if there is a firmware update out to rectify this?

4) I've also read that Android 2.1 is due out for this handset. Does anyone know when it's out, or if it is already out, where do I download it from?