The case situation is not progressing as they all look crap and cost more than the cosmos, so fuck that.
The input situation is looking a bit better. Here are the contenders
Keyboard: Logitech DiNovo Edge
Mouse: Logitech Air
Remote: Logitech Harmony One
As you can see I like logitech and infact I have a fair bit of Logitech kit already. However the reason for this is they are the best in each of the catagories.
The DiNovo edge is wafer thin, looks awesome so it wont mess up the 'look' of the lounge room and has a built in track pad so no need for a mouse when surfing the internets from the couch. I could have gone with a smaller keyboard such as the DiNovo Mini, but that would make typing difficult, but for general search and small amounts of input I can see how that could work. It also has more media buttons.
The Air mouse is quite simply an engineering marvel. It does not use IR, but very accurate gyroscopes. The fact that its 2 mice in one is also very cool as you can use it like a normal mouse but also wave it around like a Wiimote to control your computer. Fucking A.
The Harmony One is IR only (no RF, you need the 900 or the 1100 for that) but it has one click functions. So say you want to watch a movie on the HTPC it turns on the and goes to the settings required (picks the input) and turns off devices not required. It also has a docking station to keep it charged up.
I haven't actually purchased these items as yet so will do a full review when I get them. But these are my current choices. The Air mouse is overkill, but its the only situation I can think of to buy one in and I really really want one (check YouTube for some awsome vids).