Newbie needs advise

Hi I am a complete newbie to the world of home alteration. I have and use a Logitech Harmony 1100 but am getting a bit bored as it cant do everything I would like it to do.

I would like to start of small with just one room and go on from there. What I am hoping to do is control my TV, home cinema system, Sky HD box, Mac Mini and Zeppelin, lights, fireplace and heating from my iPad 2.

I have no idea how to go about this what hardware or software I would need to purchase or download.

I have the following

LG32LH3010-ZB
SkyplusSKY-HD BOX
SamsungHT-C5500
CrabtreeLP-003
B&WZepplin Mini
IR Mertik Maxitrol fireplace remote control
Mac Mini Late 2009 model
Salus Thermostat model number RT300RF (TX) running on frequency 868MHz

If anyone can help me with what I might need I would be very grateful.

Thankyou in advance

Dan