I'm also pretty interested in something like this. I make a game page on my website for every game that I fully livestream (60+ so far) and would love to be able to integrate HowLongtoBeat into the site in some way.

API or even a simple, customizable cached embed might work well too. For my needs anyway, I can't speak for everyone else here.

This site is really useful, and cool, and I've been using for a while now (probably years through Google) — I just signed up and started adding all of the games I play into it to help contribute a little. Having more links back to it from external sources would probably help reinforce the "brand" even more.