Wordpress or Typepad? Just roll your own
hoisie.com
hoisie.com
Rolling your own, while a good exercise, will most likely lead to problems.
Unless your businesses is blogging perhaps your efforts are better spent elsewhere.
It seems obvious it falls into the category of pleasure, not business.
Now, that said, feel free to tinker so you can learn Rails/Django/whatever, but please please please add support for Akismet or other robust spam filtering. Don't make spammers rich with your ignorance.
How did this get modded up so high?
Ok, so instead of focusing on other aspects of your main business, let's reinvent the wheel and waste 3 months when we could have had the thing set up in 3 days?
Brilliant! Sign me up!
Also, when I think about cool things a blog could do, it is an even greater hurdle to get into WP plugin development. Would be much easier to do it with my own framework. Also, the WYIWYG editor of WP seems to suck anyway.
The only rationale for learning to write WP plugins would be to create something that could become wildly popular (similar to "you have to have a Facebook app", maybe you also have to have a WP plugin).
When I put that code together it did everything I wanted and seemed to be fairly flexible. That was over a year ago now and I'm again considering a complete rewrite because making even small changes is just too painful.
If you can clearly see how you'll be using your site a year from now then rolling your own may work well for you. If not then you may come to regret not taking the time to leverage an existing project.