HI!
Now the code is on Inkscape 0.91+devel.
0.91+devel is the development version heading towards the future 0.92 (not released yet).

Info about 0.92 release
http://wiki.inkscape.org/wiki/index.php/Release_notes/0.92

Get it
https://inkscape.org/en/download/#download-devel
Compile it
https://code.launchpad.net/~inkscape.dev/inkscape/trunk

Here are a video working.
https://www.youtube.com/watch?v=xDef4hU4tNc

Congratulations Jabier!

And

(I wish I could review all your branches, to get them released. If your request for a review (that I saw on the dev list) means to review the LPE in Inkscape, I'd be glad to! But I think you need the code to be reviewed, right?)

Thanks Brynn, yes i need a code review, also is welcome a usage review but the tester need to compile the branch to try before is released on trunk. once is released a lot of users review it in usage mode.

All the best, Jabier.

Will this be turned into a lpe ?
How to finalize the path when we're ok with the smoothness ?

Ho v1ince, there is another button near activate LPE simplify interactive, to flattern simplify LPE. Not showed on video. A new feature.