iPad and iPhone 4 use the same hardware that the jailbreak exploits. No worries.
I was going to update to 4.2.1 last night and re-jailbreak but got lazy. Maybe tonight. I’ve got everything but my cydia stuff syncing in tunes so going from JB to JB isn’t that bad a process. The majority of my apps are legit too so that helps.
also greenpoison released the 4.2.1 for windows now 
Are you going to use anything to save you JB apps?
The few that I have are synced in itunes. The stuff from Cydia I just make a list and reinstall after.
Couldn’t do it last night before I forgot my phone at work and didn’t feel like going back out in the cold to go get it.
I need to jail break my god damn Apple TV 2 from a windows box
Do you want to borror my mac to do it?
Sounds to me like youre living a little iLife over there, with all these iProducts…
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Jailbroke mine last night. SuPer easy and quick to do. Got my hotspot up and running in like 2 minutes