Me too hmc - I'm a bit bored atm cos got no work on. I don't know what to do with myself when ds3 is asleep and the others are at nursery/school. There are 101 things I could do but they are boring (sorting out old baby clothes, clearing out my wardrobe, sorting out pantry, cleaning skirting boards!!!).
I'm enjoying be able to do stuff for school for the PTA but it will be better when ds3 goes to nursery as then I can go in and do reading and more helping. I also want to take piano lessons.
I think if you are SAHM and you have the kids in school there is a lot you can do. I'm just still a bit restricted by having ds3 with me all the time and ds2 in the afternoons.