There are still a lot of adorable blankets that you could make.
None of these are what you originally envisioned, but they would still be a welcome for the new baby.
http://www.abc-knitting-patterns.com/1114.html
http://tlc.howstuffworks.com/home/fr...-blankets2.htm
http://lostinstash.blogspot.com/2010...t-pattern.html
There are a lot more, too.