I have seen this project via LHCF (no I'm not a member!) and I think it is a great idea! I don't particularly care for straight hair but I think this tool would work as an alternative to curlformers for stretching hair. I have not seen or used a prototype but the demo does appear to be effective and in some senses quite simple - which is a great feature!
I do not know and have not spoken to the lady behind the kickstarter but it really does seem like a good project and it is nice to see innovation within the natural hair community! All the rewards for backing seem to ship exclusively to USA so I will not be dipping into my pocket but I hope the US girls will!
** Update - Thanks to readers and LHCF members, the creator, Kelechi has now added international shipping options! **
Here is the kickstarter page - CWK Straight Plates