Yes, an Octo LNB has eight independent outputs, so you can have up to 8 recivers running completely independently, or 4 twin tuners, or a combination.
In conjuction with Diseqc switches each receiver would have access to all satellites independent of what the other receivers are doing.
The best way to wire it up as far as I'm concerned is down to cost, whichever way you do it, you are going to have a lot of wiring to do.
You don't need a separate dish, let alone a separate LNB for 28.2/28.5E, they are considered to be co-located for your run of the mill 90cm dish.
The mains sats people go for are 13E,19E, 28E + one other. I think 9E has some channels that may be suitable, I don't know what language they are, but they are from India, check on Lyngsat.
9E,13E,19E,28E -- all possible with just one dish, multi LNB.
The Technomate is yes, very easy to use and inexpensive, you can't tinker with it as such, but software for it to view channels by VPS is readily available. The HD versions are a lot more expansive in the £250-£300 region.
The Dreamboxes/Linux boxes have an advantage that it is possible to network them together so that they could all access the same smart card. The Eagle Linux boxes start at about £90.
Not something I bother with as I only have one receiver, and it does all I want.
