I thought it was time to revisit my tracking of comment spam, so I went through the usual process of grepping through my crawl of Akismet stats pages. The graph I produced looked pretty weird and I started to wonder what was going on with Akismet these days. So I went and looked at their stats page to see if my processing was correct or not, and there I found that they have a graph of their own - and a lot nicer than the one I was going to post. However, the graph does show exactly the same data:
Qualitatively, while Akismet looked reasuringly predictable in its first 6 months, things seem to have gone a little haywire. So - what's up Akismet? Are the spikes huge coment spam attacks?
Update: some more data on comments, this time from Typepad.