Wow... I hadn't realised just how useful the Cydia tweak "five row keyboard" really is 'til I haven't got it. Upgraded tofrom 4.3.3 JB to 5.0.1 on Sunday, and now eagerly waiting for the 5.0.1 JB to get my fifth row back.
There are so many helpful productivity JB tweaks like five row keyboard that aren't mischievous in any way but are just really useful... so why doesn't Apple do the smart thing and include these tweaks formally in iOS?
And be good to see Apple compensating the tweak author for reuse of the tweak idea... e.g. payment, royalties, employment.
The way I see it... the JB community is a fantastic innovation sandpit which Apple could utilise as a free R&D resource and cream off the successful popular tweaks to make iOS an even better, competition beating, facility.