That control is quite unique and, I believe, you can accomplish what you want. Expensive, but possible.
I to wanted the same thing and I bought two of another type of remote control hoping that they would work. With one mounted on the wall and one on the bedside. Nope, they got confused. That remote had a timer and temperature control as well.
I have an yet to install Insteon system. It's more complicated than you might think. You also require a computer to power line Insteon interface to do the programming. I want to control a driveway light from my phone and an RF remote that's in the car. Eventually, I want to add some other, non-existant things such as hot water recirculating: phone, motion detector in bathroom; RF at kitchen sink and I want text messages from a PERS (Personal Emergency Response) alarm system.
So, for one device you need:
1. power line to computer interface (I don't think you need it, but I do)
2. A wall switch (multiple ones are available depending on the number of buttons)
3. A wall switch plate (Separate)
4. A module if not integrated into the switch.
5. The setup program - free
6. The fanlinc module
7. The bedside module; see
http://www.insteon.net/handheld-remotes.html
For the bedside remote, you would need something like this: **broken link removed**
Take a look here:
http://www.insteon.net/
I think I'm wrong about Insteon. UPB requires the PC program UPBSTART:
http://www.simply-automated.com/products/SA_UPStart.php