Ascii-o-Matic is a small flash web application where you can upload any photograph and transform it into a nice ASCII art.
See this to believe this:::
This is a small photograph
This is transformed into ASCII art as shown below.
ASCII-o-Matic website link
NOTE: While ASCII-o-Matic is faster than most other ASCII conversion tools out there it is limited to upload only JPEG images with a standard size of "60x50"