For those who still don't understand blogs and keep asking "why would I want to read what somebody ate for breakfast" there's an interesting "conversation" over at WebProWorld about the importance of blogs, corporate blogs, why blogs are important for search engine optimization and improving your search engine results, and marketing by using blogs.
It may be a bit long (and I admit I didn't read everything there) but you do pick up some pretty interesting stuff just by skimming over the page.
There are also links there to some personal blogs like Jonathan's Blog (who looks like a young dude with a ponytail but just happens to be the President and Chief Operating Officer of Sun Microsystems) and some other big shots' blogs.