It's doubtful we'll ever get a "Welcome chime" for our computers as this is an EFI POST thing and my understanding is that it would be quite hard to develop. Perhaps some sort of software after the BIOS could simulate said process, but I'm skeptical of that.
Again, doubtful on three finger gestures. It might be achievable, but just like two finger scrolling, it will only be "simulated", since the 10v trackpad isn't actually multi-touch.
The card reader shows up in System Profiler under, "USB" as "USB2.0 CRW".