the n900 will never have "slr style control" for one big reason- it's not an slr. i hear this often, and it appears you may be associating the typically manual control of a camera, with it being slr. slr stands for single-lens-reflex, meaning only that when you look through the camera viewfinder, the picture/light you see is coming through the lens... the n900, or any mobile phone for that matter is not an slr, and never will be. if you want manual control of the shutter speed, aperature, exposure, that is a different issue completely...

slrs are typically mechanical cameras. mechanical shutters, mechanical lens/glass, and for 35mm slr cameras, mechanical film advance... i associate the quick-reponsivness, and large body with an slr... both characteristics of an slr (and hopefully responsiveness of the n900 too)

hope that helps some