feature list:
login
logout
fans
post image
post video
draw
brushes
colors
layers
rotate image
rotate layer
select box
lasso
rotate selection
set layer transparancy
layer effects
captions
comments
private messages
like
ssl
invite twitter followers to become your fans on s.ketchbook.com
post to twitter
post to facebook
post to tumblr
post to google+
rearrange sketchbook
books
private yourself
private fans
public
optional allow all fans (allow all default)

launch date: first quarter 2012
environment: unix, php, html5, mysql, jquery
developer: matthew davis
help support the site! email matthew with ideas, code, directions to secret treasure