Cutting edge is nothing but doing what type of works. As this relates to link building, my explanation of cutting edge would be "when advertising, public relations and SEO/link building work jointly in achieving the common strategy".

So marketing sets out the company objectives, public relations garner news coverage, link building produces an online buzz and enduring high quality links, SEO makes sure the website is optimized with high quality content that would turn those links into search engine traffic.
There are six main objectives that you should address when you have thousands of links. Here they are:

1.Use your link power efficiently.
2.Trace out who links to you currently - and who gets you traffic.
3.Catch the most out of what you already have.
4.Look at marketplace segments where you are weak.
5.Look for talented markets.
6.Plan initiative for the year in advance.