There's a lot of patterns where the main portion is knit and have a crochet edging. Caron has a shawl, it's knit sideways with the edging picked up so you could make that long and narrow and more of a scarf. Elann has a pattern for a pinwheel cardigan that has a crocheted edging. It's with their Lara yarn and is in red (to help you find it because I don't have a link).
sue- knitting heretic