I have commented a lot on the official campaigns for the London Mayor elections, but there is also a wide range of unofficial internet activity around the London Mayor elections!
The most noteworthy so far have been:
Pro-Boris hackers taking over the official Harriet Harman website (username; Harriet, password: Harman!)
Hacked homepage of Harriet Harman's official website (as spotted by Guido Fawkes)
There have also been a number of instances of 'cybersquatting' (where savvy internet users register related domain names and serve their own messages):
Anti-Ken website served under www.kenlivingstone.org
There is even a campaign to get Boris Johnson to number one with the rather brilliant "Is Fatboy Slim a DJ?"
"Is Fatboy Slim A DJ?" - the Boris song, here it at www.borisborisboris.com
As this week progresses it may be more entertaining to keep an eye on London Mayor viral / unofficial internet activity than on the official campaigns!
UPDATE: Mayor candidates as characters from Rainbow is getting lots of views on YouTube!