A few days ago, an email update went out to Anomalisa's Kickstarter backers, bringing news that production is around 70% complete and will no longer be a 40-minute short as originally intended:
The original kickstarter campaign for Anomalisa was for a 40 minute short. The success of our campaign provided us the opportunity to secure additional funding and expand the project into a full-length feature. This has allowed us to preserve the original scope of Charlie’s script, without compromise or outside influence.
Production is now 70% complete and when finished, Anomalisa will come in at around 80 minutes in length. (Source)
Thanks to Dan!