There are a lot of other websites out there which offer a great sample of scifi. The most popular according to Google are SF Site, Scifi.com. An useful one is at www.magicdragon.com with the Ultimate Science Fiction Web Guide. The interesting thing is that this site has not been updated in 4 years yet it's still #9 on a Google search for "science fiction". Gawker Media has the 800 pound gorilla with io9. The sheer quantity of searches and material on this site is overwhelming. Yet I must wonder why they won't let me post a comment.
For help with writing Science Fiction try Jeffrey Carver at www.starrigger.net or try his blog.
I'm most interested in time travel at sites like crystalinks, or time-travel.com, and there's even a site for time-travelling investors!