Ceri - I'm the same. Not much in the way of symptoms, bloated, a bit tired, a tiny bit nauseous before I eat in the morning. Oh and bbs still hurt. I think I'd feel better if I had some full blown morning sickness though - maybe that'll happen in a week or so.
Kazy - I'm having a scan on Friday (6+1) and they said its 50/50 whether I'll see a heartbeat or not. So I'm going into that not expecting to see it. At 7 or 8 weeks I think it's pretty certain you'll see it. I'm having one at 7+2 aswell (not that I'm paranoid or anything)