Website:

• http://www.blogger.com/

(Usually hosted as [Name of Blog].blogspot.com)

Set-up and subscription fees:

• None (free)

Hosting:

• Hosted on Google's servers and relatively stable
  

Number of Default Themes:

• Approximately 30, although thousands more can be downloaded (many for free) from the internet
  

Theme Personalization:

• Free to edit, but requires knowledge of HTML and CSS
• Can pay others for unique themes
• Most additions can be easily found by doing a search and has an extensive support section. In some cases requires more than basic knowledge... such as how to parse a url.

Widget Integration:

• Widgitized backend making adjustments to the sidepanel trivial
• Most new widgets support Blogger by default

Group Blog support:

• Yes

Notes:

• One of the first blog platforms to hit mainstream, Blogger was bought by Google in 2003.
  
• There is no paid option with Blogger, although Google does make it trivial to add AdWords to your site so that you can generate revenue if you so desired.
  

Example real estate blogs:

• http://agentceo.blogspot.com/
• http://boulderrealty.blogspot.com/
• http://genopetroche.blogspot.com/
• http://dalechumbley.blogspot.com/
• http://propertygrunt.blogspot.com/