J2me newbie graphics questions

Hi all.
I've been messing with J2SE for a while but now I'm looking at J2ME for games on mobile phones.
I've got a few questions which I'd appreciate any input on.
1) Could you please point me towards somewhere I can get a comparison of screen dimensions/colour depth of current common mobile phones. E.g. what is the minimum/maxiumum dimensions I could expect to find on current devices capable of using java MIDlets (I'm currently looking at Nokia's N-Gage at 176x208,12bpp and 7210 at 128x128 but I've seen res low as 96x65 mono so any help is much appreciated).
2) As far as I'm aware, I can't scale Graphics image draw function so I'd have to pre-calculate it in code if required. Is this right?
3) I haven't found any way to draw an area of an image (only the entire image) in the basic Graphics class. Is there any way to do this, or even to make a new Image which references the same source data but uses a different stride?
4) I understand that there is no support for translucency, but does punch through transparency work OK? If so then is there any significant hit for using it (in general, as it could vary dramatically with different hardware).
Thanks in advance.
-nmk

P.S: Any comparisions of memory size and screen latency would also be helpful. thanks!

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