I have been researching various blogging software and tools for last few days. Mostly out of curiosity I started looking at various published APIs that allow client side tools to interact with blogs. My curiosity led me to this cool article that shows how to implement MetaWebLog API in .NET. There are three main API sets that I came across and those are Blogger, MetaWebLog and LiveJournal. MetaWebLog from what appears to be is a superset to Blogger API, but LiveJournal is different.

The article goes into details on how to create an HttpHandler and then also define the MetaWebLog data structures. Checkout the article here.