There are many bloggers around the world who blog on Knowledge Management - so called "KM bloggers".
You can see below my personal KM Blogroll below which is dynamically embedded from the blogs I actually read via Google Reader.
And you can see a list created by Stan Garfield here.
KM in all its forms is a huge world-wide movement and I work continuously to pull together details of all the global KM activity around the world both off-line and on-line. If you are seeking to engage in the global KM world then attending conferences or workshops or a KM course or joining an on-line KM discussion forum or social network is a great way to get started. Here are some KM Resources that may be of help.
The Gurteen Knowledge Community is a global learning community
of over 21,000 people in 160 countries across the world.
The community is for people who are committed to making a difference:
people who wish to share and learn from each other and who strive to see
the world differently, think differently and act differently.
Membership of the Gurteen Knowledge Community is free.