According to Techcrunch Del.icio.us is bigger than Digg:
Digg, by comparison, reported last month that it has a half million registered users. While del.icio.us came online in late 2003, Digg launched in December of 2004. That means that del.icio.us had 300k users in its first two years and Digg has 500k in its first two years. The impact of the Yahoo! acquisition has also been big, though – with del.icio.us gaining more than 600k in the last 9 months.
In other words, for all its high profile expansion, the impact of being acquired by Yahoo! may have brought more users to Del.icio.us than everything Digg’s done for itself so far. In some ways the sites are very different and used for different purposes, but the comparison is interesting.
Apples and oranges Marshall. This isn’t a story. When Yahoo acquires a company it can do cross promotion across products driving more traffic to the newly adopted site and exposing it to a new audience. It’s essentially Internet marketing 101.
If Google were to buy Digg then this might be a valid perspective but while Digg is independent it’s just the wrong comparison.