You want this if you use Lightroom!

The Photo Engine plugin allows you to publish collections to WordPress. This one is easy to set up, and it works like a charm, removing the need for exporting from Lightroom and then uploading.
Like all publish services, this is a simple matter of configuring once and never look at it again. You fill in your key, then the token from your site, and then start publishing.
It might be a good idea to resize your image, as some WordPress sites might otherwise time out during the upload. But in many cases, this is not a drawback, as you probably don’t need your large image on a blog, and the smaller version performs much better.

I did have a small problem once, but the awesome support of Jordy and Thomas helped me along very fast. So I’ll just repeat it: if you use Lightroom and WordPress, this is the plugin you want.