I get ideas, similarly to you, from news and articles I read and discussions (including IRC chats). They don't necessarily come immediately. For example, I sometimes get frustrated by something I've read in a story and then start thinking about it which leads to some interesting thought process that I end up realizing could be turned into an article.
Also, I sometimes get ideas from movies, music and various videos. I think ideas can come from almost anywhere though if you're a bit mindful of what you're experiencing at any moment, depending on the topic of your blog.