This is their own presentation:
What is Patternfish?
Patternfish is an online store where you can buy or sell your knitting or crochet patterns as customized PDF downloads.Nothing in Patternfish is available for less than $3.00 US. Nor will you find advertising. We want to provide you with a calm, beautiful place to browse and pick and choose.
It is really a nice and professional quality web place for knitters and crocheters, selling or bying patterns, the only thing is that they want published patterns web exclusive, meaning that you can not publish your patterns any other place than at their site! Well, if you are a designer with lots of patterns avalible with possibility to spread them out on different sites it's ok. Who knows, maybe this is the thing, I'll check them out now and then to see how they turn up. They have by now about 9.000 patterns.
FAIR LADY - Dorothy Siemens for Fiddlesticks