iPhone OS 4.0

[Jordy]

I haven't heard good stuff about the developers preview. Apparantly it's incredibly buggy and impossible to downgrade. That will be ironed out by release of course but as developers I would suggest you don't bother for now.

[Markeh]

I'm not gonna buy a new iPod just to gain multitasking. I shall likely wait until either this year's iPod touch or next year's. The only reason I upgrade is if I've run out of space.

I only really upgrade the OS when I have an iTunes voucher. I was running 2.2.1 until January, purely because I only buy anything from iTunes when I have a voucher.

I like the look of the Games Center, and iAd does look quite well executed. Folders will clear my home screens up a hell of a lot, and the wallpaper isn't exactly anything special to me, but it's a nice touch (that should have been there from the original iPhone, but nvm)

[Kieran]

Well I wont be upgrading until it's jailbroken

[HotelUser]

i use an iphone 3g and am a bit dissapointed that i won't be getting multi-tasking... but my upgrade is due in the summer, and so i will be getting the new iphone that will be released in the summer, so it won't affect me, the next iPhone promises to be a cracker.

You can get multitasking through jailbroke applications.

[DaveTaylor]

I'll post a full review later so far I am rather impressed with it.

[StefanWolves]

You can get multitasking through jailbroke applications.

yeah i know that, but once 4.0 is out i don't think i'll be jailbreaking, they're even putting in in-app texting so you don't have to exit applications to text... the only thing i will be missing if i don't jailbreak is all apps free... but I can do without that.

[MrPinkPanther]

My summary from having used it for nearly 24 Hours now:
Nothing revolutionary but better than 2.0 to 3.0 was. Beta builds pretty good