DB, you are priceless. I loved your 'tree' OP (nearly spat tea all over my keyboard at that one!)
Blackduck - when I say I'm dabbling, what I mean is no way in hell am I going to start one right now (preg with no 2) but I would really like to do one in the future, preferably before my kids fly the nest.
Thanks so much for all your input, you've all given me lots of food for thought. This time next year I'll have a 6 month-old and a 4 yo so I don't expect to start anything before 2011, which is why I'm trying to find out as much as I can well in advance.
My subject is I think going to be partially artsy but also require lab work - it's about a specific way the media impacts our brains. I think I would have to do it within the context of a psychology dept so perhaps that's a good place to start my investigations. Also I simply could not afford to do it without a grant of some sort. As long as my current self-emp career takes off (first paid job next week, huzzah!) I can top up my income by doing odd bits of work here and there as it's well-paid for few hours. Also my subject is directly relevant to the area I'm trying to break into at the mo, so I already have a long-held interest, which is self-motivating. It's just occurred to me that one of my old lecturers is now a Prof in a related area of psychology, so I may track him down.
I think the p/t option would work best for me, which is clearly going to limit my options. Certainly if my bro is anything to go by, his PhD funding institution is being far stricter about the duration of his research, so thanks to those of you who talked about supervisors and laying out the terms with regard to family commitments, etc.
Thanks also for mention of PhD in US - funnily enough someone recently mentioned to me that the Yanks have a far better attitude in academia - they actually want you to succeed. Can't quite imagine upping sticks to the US, though - nor listening to my DC's calling me 'mwarrrrrrmeeeeeeee!
By the way, ABD, as an aside, I didn't want to post anything further on that thread as it had turned so unpleasant and sapped my will to live, but I did think you were being attacked by the person who dug up one of your old posts. What a horrible convo that turned out to be. I think from now on I shall avoid those sort of threads as the usual suspects always turn up and churn out their usual polemics, which makes thoughtful conversation impossible.