Even if you buy a jtag you can't go online, if your jtag unbanned if you sign into xbox live you will be console banned within mins, also that's if your jtag not already banned when you buy it. The only way you will be able to run lobbies if you buy a dev kit which is a small chance you will find one and trust me even if you there's a little chance you fine one be prepare to spent a lot of money.
True, but there are ways around that. I have 2 xbox's as it is, and I think the infection method still works
You can go online with a xbox 360 slim rgh dual nand I believe.
I believe so too. I have a 250GB slim, and just pre-ordered the Halo console. I'll have to check