It’s still there[1], although a number of the posts seem to be missing. Inexplicably, (most of) the comments are in place. (There are other Microsoft blogs that have disappeared without a trace, but not this one.)

[1] https://docs.microsoft.com/en-us/archive/blogs/larryosterman...

I haven't heard that name in a few years, but I remember quite vividly that I found his blog by searching for "+int03 +blog".

At the time that seemed like a good way of getting low-level code-related posts.