You know, if someone told me 3 years ago when I started the 5 Star blog,
that I would have to write one article every day to create new content for my web site - i would have said NO WAY - I don't have time.
But once you get your blog set up and start blogging it becomes habit and is really easy. It doesn't feel like you are creating a new page or writing a new article - it's just fun.
To save time (and your wrists if you have carpal like I do) just scan the RSS feeds of blogs in your niche and pick good news stories or other people's blog posts to highlight and just comment on and quote them.
Here's an example of one I did quoting another blog that didn't take any time at all.
5 Star Affiliate Marketing Blogs, Google and SEO Blog » Will Search Engines Become the Biggest Affiliates?
The upsides of making the time to blog are:
1) Increased traffic. Search engines LOVE blogs. (my blog is ranked #1 and is the highest traffic part of my site)
2) Wider exposure (also increased traffic). Instead of just being found in search engines, with a blog your site will get distributed to a ton of BLOG search engines like Technorati, Google Blog search and a TON of others.(you need to submit once then after that its easy.)
3) Links - people that like your blog or specific posts will quote and link to you on their blog.
4) Reputation - great way to position yourself as an industry expert.
There is more but those are some of the main benes.