Q17) Copies on Xbox live, possible and will I get banned from live if I do.
Yes it is possible to backup games although as mentioned above you can only play backup games (1:1 copies) and you can not hack them like you can the wii ones (retextures and whatnot).
Online is fine for most people although microsoft occasionally bans people if it detects you are playing copies. The bans usually all come at once (hence the term banning wave).
Nobody really knows how it works but we suspect either
bad burns of games do it (along with bad dumps; some of the "early"* (as in before release dates) releases are sometimes bad and with no frame of reference/way to compare until release date....)
playing games online before release dates
some have cast doubt on some of the modding methods (the xbox can tell if you power it without a drive connected as you might have to, realistically there is no reason to have it out other than to mod it).
The "what causes bans" area is little more than rampant speculation most of the time though so I would not read much into it. [wild theorising]were I to be MS I would have a group of "probables" and only ban a select few of them at random, also I would use a combination of factors to try and determine who is up to no good[/wild theorising]
For what it is worth though it is the 360 that is banned, not the account and you can simply move your drive/account to another 360.
Unbanning was taken care of back in question 12) (it is quite hard and needs some specialist equipment and hardware and only works on earlier 360s).
Regarding the specific region question: I would say not, all xbox 360 games are at present 1:1 copies (give or take the hacking to get them working) and any "region free" that exists was built in/allowed by the developers/their publishers.
*early games. They come in two main forms:
"reviewer copies": it is speculated that there are several grades of reviewer and some of the less privileged have a stock 360 and get sent review copies for that. These occasionally find themselves online and can be played on flashed 360s.
Part of the problem is many of these releases are from p2p groups and while some are good at dumping games some are not (the same could be said for some of the scene groups but not as often).
"pre sale copies": either from a game shop or from a pressing plant, these are retail copies and should be good. Occasionally shops break release dates and MS has stated in the past nothing should happen to these people (look back at GTA4 for this one).
Q19) Homebrew on the 360; what is there and how can I do it?
A bug was found in earlier kernels which meant homebrew could be run, however it was fixed and these earlier kernels do not support newer 360s (broadly speaking if your 360 supports HDMI then you can not do homebrew). Also older 360s that had a warranty replacement/fix will also be unable to run homebrew.
It will also cost you the ability to run newer games and because of all this there is very little available.
At this time you are encouraged to watch the google talks presentation on the xbox 360 security:
http://www.youtube.com/watch?v=uxjpmc8ZIxM&fmt=18
Q20) Is there anything like the gamecube-IDE adapter or the flatmii for the 360?
There has been a proof of concept demo but there is nothing commercial or even "homebrew" available on the subject.
http://www.xboxhacker.net/index.php?&topic=8335.0
Basically if your drive breaks you will need a proper replacement, if you do not want to send it to microsoft the same model is easiest although you can "spoof" another drive model and use that instead. Unlike the wii you can not just slot it in as the drive is locked to a 360 (hence the having to dump the firmware to mod it). For same model drive replacement you use the same methods as you do for flashing to play copies are used to replace (although obviously with the firmware from the xbox with the broken drive), spoofing is a bit more in depth (although nothing major and no extra hardware should be needed):
http://www.xbox-scene.com/xbox360-tools/36...wareToolbox.php