Akamai has published the first in a series of quarterly looks at the state of the internet (warning, requires registration), which they would be in a unique position to report on. From the summary:
Starting with the January to March (1st quarter) 2008 time period, Akamai will be publishing a quarterly â€œState of the Internetâ€ report. This report will include data gathered across Akamaiâ€™s global server network about attack traffic and broadband adoption, as well as trends seen in this data over time. It will also aggregate publicly available news and information about notable events seen throughout the quarter, including Denial of Service attacks, Web site hacks, and network events.
Here is a local copy of the report, for those who don’t want to provide an email address.