More importantly, an OTA update on Friday night is going to add photo filters to the app. Everyday, new filters will be added to Itsdagram without requiring an update. This basically makes Itsdagram a full featured Instagram client. While those with an Instagram account can take advantage of the free trial that allows them to upload one picture for free, those without such an account will have to shell out $1.49 for the app without testing it out.
Until Instagram officially becomes available for Windows Phone, Itsdagram is about as good as it gets. Version 1.1.5 is available for Windows Phone 8 users with a version planned for Windows Phone 7.x users.
source: Itsdagram via WPCentral