The discovery of two things have made be very happy in the last 24 hours. I discovered the pdf of this book for iBooks:

The Checklist of Fantastic Literature (1948) is a bibliography of English science fiction, fantasy and weird books compiled and edited by Everett F. Bleiler. This can be a good guide to finding texts on Project Gutenberg. 

http://en.bookfi.org/book/1330255

Then I found this: Build Your Own Anthology http://www.anthologybuilder.com/welcome.php

Several current SFF writers have previously published stories on this site Marie Brennan and Mary Robinette Kowal, esp. jumped out at me. Has anyone tried this? It could be really cool to build samplers or have all the short stories of one of your favorites together in one book.

Rhonda