One thing I'd like to see here as soon as possible, as it is a very important tool sometimes, is the ability to embed images and youtube videos, or even videos from other sources, maybe even uploaded ones, into the post's message, as sometimes a video or image can greatly depict or help describe something you are talking about, specially so if it is something abstract.

I second that.  I believe we'll see this in the new release of the brand new site at the end of the month.