(taken from: http://www.dropline.net/drivel/)
Drivel is a GNOME client for working with online journals, also known as weblogs or simply blogs. It retains a simple and elegant design while providing many powerful features, including:
Integrated spellchecking and HTML syntax highlighting
If you're using Ubuntu (or Debian or any deb-based distro (i suppose) ), get the deb file from here.
PROs: (based on my use)
CONs: (based on my use)