So I was really upset backgrounds on the 3G weren't enabled. I was fine with no multitasking, but the no backgrounds deal really got me upset. Then I found out there's actually a good reason why: In implementing homescreen wallpapers, Apple realised that (as is clear from many Jailbreak themes) custom backgrounds often look rubbish and/or reduce usability. To counteract this they've added drop shadows to all the icons and text which make it much more readable / attractive. Unfortunately this runs like crap on a 3G (and you can test this on a jailbroken device, google "enable homescreen wallpapers 3g"). So Apple were left with 3 choices: 1. Enable it on the 3G, leaving it running like crap. 2. Enable it on the 3G, but remove the shadows making it look crap. 3. Disable it on the 3G completely.