This is one of the less popular sites, I have not had enough time to collect reliable review information about sales level.
Featurepics recently changed their pricing structure by 'flattening' new microstock upload prices, and allowing only authors of 'midstock' images to set their own price. Previously it was possible to set the price of all uploads. As was seen with other sites (snapvillage etc.) allowing user selected pricing leads to confusion not only amongst consumers but also with photographers who might not be used to setting a price for their work or how to value it appropriately.
The commission set-up is very good, you take 50% of the selling price, 60% and 70% options available for premium 'midstock' images. A standard image is USD $5 (for our typical 1200x1600), not the best value for the buyer (lower resolution available from $1), but a great commission for the photographer.
Overall the site is professional looking, and gaining a market share, alexa ranking is better than most of the 'trailing sites' so it might be worth investing a little of your time in uploading a few images. I really do hope that this site becomes popular!
2011 saw just a handful of sales earning a couple of dollars. Featurepics is a "site I'm keeping my eye on", but things are not moving very quickly, a recent update of the site shows some commitment from the featurepics team to develop their business.

..is a good site..
dabobabo (not verified) on Fri, 05/22/2009 - 08:49so far
Steve Gibson on Sat, 05/23/2009 - 00:00Well, so far I'm yet to have any sales on 260 odd images, so it's not looking too good for me, but the site is not dead, they are discussing ways to increase sales with different license options ($1 web license has been pooled)
http://www.featureimage.com/Forum/Default.aspx?g=posts&t=506
The problem at the moment may be variable pricing which the people at snapvillage said confused customers, perhaps also some tweeks and testing of the page layout on the site to make it more focused. They do employ some good stuff like 'free blog licenses' which I think more stock sites should adopt, it's clearly not a site that should be written off just yet which is why my review is left open while I continue uploading.
Update: 6 Jul 09: They listened, variable pricing of microstock has been dropped in favour of fixed prices (see above) I've also had a couple of sales which is good news - but nothing significant yet