Happy Birthday to all the 3 year olds! Evie still has 3 weeks to go until hers, its quite nice that it doesn't interfere with the Christmas excitement TBH (although I wasn't thinking that this time 3 years ago!). I have bought a doll's house and furniture for DD for Christmas from ebay and also some Sylvanian animals, for her birthday she'll be getting a bike 
Clara, lol at your joint birthday comment... my Mum actually did give me a joint for my 15th birthday, and some hash cakes
As for boundaries, DD is always pushing them, her most common phrase to say is "I not" which she uses when you ask her to stop doing something. She definitely does things deliberately to wind her brothers up too. I think 3 is harder than 2 because they are proper little people now and know their own minds but are still too young to realise that other people matter too IYKWIM? Its all about cause and effect (I smash DS1's lego, he screams!)
Dundee
, hello and congratulations! Glad the heart murmur is not too serious, must have been a worry!
Skid I like your comment about DD 'lording it' over DS1, my DS1 definitely lords it over both of the other 2! Re School, I have been unable to get DD into a preschool as the one I put her name down for closed, as did a couple of others here which meant there was a shortage of places. She may get a place at the school nursery after Easter (she's not funded until then) although might not until September. I don't mind too much although I think it would do her good to go somewhere now! Only problem is they will want her 5 afternoons a week straight off which might be a bit much. Our babies are growing up too fast 
BT, 2 hours is nothing for holding wee, I'm sure DD is part camel! She went this morning and then not again until 4.30 this afternoon. This is quite common for her! I took her nappies off on Thursday as I knew I'd be at home for a few days and its not going too bad. She still doesn't know how to let it go but other than a puddle on day one there have been no major disasters (touch wood), just wet patches in her knickers. It does worry me a little that she holds it for so long, she can start to go then stop it and then not let it out for 2 hours or more. I've tried giving her more drink today to encourage more weeing but she's refusing it, even when I give her ribena instead of water - I think she's onto me...
Clairey, ooh, exciting about the job! It is daunting, I'm not sure how I'll be when I start looking into doing 'real' work again after DD goes to school! My advice on dummies would be not to worry too much about it unless it a)bothers you or b)he never takes it out. When DS2 was 3 we tried to lose it but he didn't sleep well in the day and was overtired at night, when he was nearly 4 he decided to give it up himself and threw it in the bin, after a week he had a visit from the dummy fairy
Cutting the teats off is a good way for them to give it up themselves too. IMHO I don't think it hurts them to have it for comfort at bedtime, you wouldn't take a snuggly or teddy away!
Right, off to sort the kids out, we have snow snow snow here so they are hyper-excited about the morning!