Just read the blog post on the new postfix code completion feature - looks like a great idea.
Looking at the configuration screenshot - it doesn't look like we can add our own postfix completions.
Live templates are Ok - but having the ability to define project specific live templates is a killer feature. I could see the ability to define project specific postfix completions being equally valuable.
I can see why you might not have it in the first release (I imagine live template configuration took a while to build initially). But will we see user configurable postfix completions in a future version?