To get started, simply login to you FriendFeed account and go to Embeddable Widgets. Uncheck the Logo, Comments and Subscribe option to remove all the FriendFeed branding.
While there are enough services already convert feeds into images, the feed widget from FriendFeed is far better because it supports image thumbnails and you also have more control over the output image.
For instance, you may choose to convert either you full lifestream into an image or selected service like pictures uploaded on Flickr, items you wish to buy on Amazon, your blog entries, LinkedIn updates, etc. The width of the image can be customized as well.
Related: Converts Images into ASCII Text