Apparat has another new feature called Macro Expansion. I talked about this with Nico Zimmermann at FFK in Cologne. Nico was using TDSI for a project but he was not very satisfied with it because you have to inline all inverse-square root tricks manually.
This is why Apparat has now macro expansion. I am actually not a big fan of it. I think a good compiler would do this for you without you having to go through all the steps. Unfortunately writing this compiler will take longer than the couple of hours I have spent on the macro expansion today.
So if you want to have quick and dirty inlining capabilities: this is for you. It is an easy fix for a feature a lot of people have asked for. I will continue working on TAAS to implement this much better in the future.