Basically anything that is suitable for lightweight backpacking works well with the 7.
We use Snugpack "Softie 2" sleeping bags which pack really small plus small camping pillows, the inflatable pillows from Go-Outdoors are tiny when deflated. Each sleeping bag will actually fit inside a helmet which we've needed to do travelling to Le Mans. Inflatable sleeping mats from Thermarest are ideal particularly the shorter versions.
The choice of tents is massive and basically down to how much you're prepared to pay. The Terra Nova Trisar 2 is about as small as you'd probably go, but there's cheaper decent tents from the likes of Vango. Shorter sleeping mats are better if the tent tapers a lot at the back end.
Don't forget a couple of chairs and a table make things much more comfy, Helios do superb ones that pack really small but are expensive, lots of Chinese knock-offs available though.
Stu.