That would be enough for most shawls. The Feather and Fan pattern is fairly easy - 1 pattern row out of 4, the others are either knit or purl rows. It can be done in a triangle - http://www.knitting-and.com/knitting...fort-shawl.htm
- or rectangle - http://knitlist.com/99gift/shell-and-wave-shawl.htm
There's several shawls on the Lion Brand site, like this one - http://cache.lionbrand.com/patterns/60301.html
and many more. There are tons of patterns at http://www.knittingpatterncentral.co...wls_stoles.php
and at http://dailyknitter.com/patternsdetail.php?type=SH
Any of them can be made in any weight yarn, usually you use a needle about 3-4 sizes larger than you would normally knit it with.