I don't know if its the same for everyone here in the UK but as far as I can see Orange have not messed with the phone at all. No logos, no bloatware, no splash screens, no problem with sideloading or tethering and I haven't tried another sim but I suspect its unlocked.
Launcher Pro and Home Switcher mean I've now got it set up pretty much as I want and it certainly flies!! Very happy so far!! And yes Roze it is the perfect size!!