Three Needle Bind Off? - HELP!

Today I mainly want to be a cat, curled up in a sunny patch, asleep ... or just dozing. I realise I have been daydreaming about sleeping a lot recently and can only put it down to 5 months of sleep deprivation. Roll on 6 months and hopefully Little Roo will be sleeping more and feeding less in the night. It does make it difficult at the moment to choose what I want to do with any scraps of time I might have for myself. A big part of me will be saying - sleep - but then I think I could be knitting!

I'm in the middle of knitting Little Roo a baby kimono which was featured in Interweave some time back. I managed to buy a photocopy of the pattern from Interweave and have been happily knitting away. It is knit in one piece and then it appears to be joined together by some clever three knitting needle bind off (or cast off for those in the UK). Unfortunately I didn't get a copy of the glossary with my photocopy so don't really know how it is done. So if anyone out there knows how to do such a thing or knows of a tutorial on the web they can direct me to, please let me know! I'm sure I will eventually find out how to do it - otherwise it will be seaming for me!