Is it ever okay to include inline CSS in plugins?

Normally in a plugin I would add styles using wp_enqueue_style. However, I am currently creating a plugin that only needs a few lines of CSS and I am wondering if it might be better to serve the styles inline to save a request. Obviously there are many advantages to using wp_enqueue_style, but are they worth the extra request for such a small piece of CSS? Is there any accepted ‘best practice’ in this area?

Get all posts in RSS

I’m wondering how/if I can access more than the most recent X posts defined in the wordpress settings. I’ve seen plugins that migrate all blog content through RSS, haven’t poked around to see their methods.