That 2nd page is loading just fine for me. LinkedIn Share is there and the page is speedy as can be.
Can you try from different browsers or a different computer? It's possible you have some blocker enabled that's preventing it, or something in between you and the site is actually blocking LinkedIn. There's a lot of firewalls and other things out there the block random things depending on if you're at a company, web cafe, etc.
Fo another test, try hitting our blog, and see if the LinkedIn button gives you issues there:
www.sourcecoast.com/blog
Let us know. From my standpoint though, the page is acting just fine (Chrome on a Mac.. I reloaded many times). Can test more if you'd like.
Thanks,
Alex