Jailbreaking is a term used to describe the process whereby an iPhone can use applications not available through the iTunes App Store which otherwise is the only source of apps for the iPhone. Such limitations do not apply to the iMac and so jailbreaking is of no relevance.
If you mean on an IMac, all you need to do is move it to trash and empty the trash. It deletes all the files with it (Unlike windows). If you mean an IPhone, then I am pretty sure it is not possible unless you jailbreak.
It is not possible to convert a DVD into an iMac.
It is possible to root / jailbreak the Droid Eris. You need to use a program like Unrevoked to root it.
No. You can only play games made for Mac OS on an iMac.
Yes. It is possible to jailbreak a DNA 30 box mod up to 42 watts. If so how?
Yes but not on jailbreakme.com
Yes and it is called rooting
No, its not possible. Wait for the greenpOison to be released.
yes it is you can use redsnow to do it
yes use limerain
If you update your iPhone/iPod, you will remove the jailbreak, then you would have to wait until the jailbreaking websites invent a jailbreak for the new ios, but why update if you jailbroke it?
Sorry, not possible yet but there are people working hard on it.