The Nikon S51c has since been replaced by the Nikon Coolpix S52c, also with wifi connectivity. Here's what we had to say about the s51c when it came out:
Here's something we haven't seen in a while: Wi-Fi. The Nikon S51c is pretty much identical to the S50, except it has wireless photo transfer, allowing you to move photos from the camera to your computer over a home Wi-Fi network. Is that worth the price bump? Probably not.