SimpleSpark is a directory of web 2.0 applications and services that launched in May. When we included them in our web 2.0 lists round up in late June, they'd just crossed the 3,000 sites indexed mark. Today, they've indexed 5,000 sites, which is an illustration of just how large the web 2.0 application universe has grown -- whatever your definition of the term.
To further illustrate how many sites that is, and to celebrate their milestone, the folks at SimpleSpark created a video showing the logos of all 5,000 companies in 333 seconds (or just over five and a half minutes). It's embedded below. Enjoy.