The blog engine I use (dasBlog 1.9) supports the Live Writer API and I'm liking the interface mainly due to the fact that it looks like I'm composing an email or normal document rather than posting to my blog.  I say this because more times than not, I post during work hours.

Another option I have since I use dasBlog, is the "mail to weblog" posting feature.  This feature allows me to post by simply sending an email to a preset email address that the blog engine monitors and posts when it receives it.  As much as I love this feature, the formatting is a bit off when I use Outlook.  If I had a phone with easy access to email, I would post quick features while on the road.  But for everyday posting its just not robust enough.

Which bring me back to Live Writer.  Along with the slick UI, there is the ability to save drafts and spell checking.  Long gone are the days when I type up a post, copy it into Word just to check my spelling. 

UPDATE: Two thumbs up... way up for this little item.  Not only did it keep the formatting exactly like I entered it but it also uploaded the image above for me.  I wasn't expecting that at all.  When I put it in I thought to myself "oh great, I'll have to upload the image manually".  It's that little touch that makes everything grand.