"blog": noun or verb?

For some time now, the use of the word “blog” has bothered me a little. We all know that a blog, short for “weblog”, is in most cases an online diary of sorts. But the use of the word blog as a verb somehow doesn’t sit right with me.

For example: “I want to blog about [insert topic here]. You wouldn’t say “I want to diary about [insert topic here]”. You would write in your diary about said topic.

Or

“I wrote a blog about [insert topic here].” Did you dedicate the whole blog to that topic, or just one entry?

I’m well aware that there are many other words in the English language that can be both nouns and verbs, but for some reason this one just seems weird. Perhaps it’s just because it’s still a relatively new word.