Perhaps I'm not understandiong your question, but I believe you can hook/synch to as many computers as you want. The trick is to have iTunes on each computer, and your iPhone will synch (whatever THAT means) to each computer individually. I have my iPhone on 3 different computers, all with their "backup" files for my iPhone. If one computer goes bad, I'll always have the others for my backups. (Note: other than backup, I dare not do anything else in iTunes for fear of losing Contacts, photos, other important stuff....)
Is this what you were asking?