Houzz is a image hoarder's dream of residential design images uploaded by the designers themselves. Part design tool, part marketing tool the site allows you to flip through 1000's of images and save the ones you like to idea books saved to your profile. You can make notes about what you like about a particular design and critique what you don't. They even have swinging tags that give you product information for some of the things you see in the images.
Image of Houzz's homepage
Now if you really want to get fancy and create an inspiration board, I have found no better way than Pinterest, here you can "pin" or save images to a pin board of virtually anything on the internet! You can create a board by room - pinning furniture, paint colors, inspiration, and decor items. If you combine the two you could have the ultimate image gathering machine. The sky is the limit!