The start of Template-Process is out. Its main thrust will be to allow TT2 processing merged with data files in various formats (YAML is the first supported format) with no programming at all. Right now, you may say
$ tt --tt foo.tt.html -y data.yml -o foo.html
and process the template foo.tt.html with variables taken from the hash serialized into data.yml with an output to foo.html.