[b][color=indigo]When I did it, I used the same concept as for an afterthought heel. When you get to the 30 sts, use a piece of waste yarn and knit the 30 sts turn and knit back still using the waste yarn. Then pick up your working yarn and keep on knitting as you would if you'd not stopped to put in the sleeve.
When it comes time to do the sleeves, just pick out the waste yarn, pick up the sts and knit according to instructions.
You can see a pick of the child sized pinwheel sweater before I've started the sleeves on my blog. The two white areas that seem out of place on the yellow stripe is where the sleeves will go when I start them today. :happydance: [/color][/b]