Although BuddyPress builds a complete social network in your WordPress installation but if you like creating a Twitter type micro blogging site in minutes using BuddyPress then you can easily do so following five simple steps.
Step-1 Install and Activate BuddyPress
Step-2 Install and Activate BuddyPress Followers
Step-3 Install and Activate BuddyPress Activity Stream Hashtags
Step-4 Visit your BuddyPress Settings from Dashboard and disable components forums, groups, friend connections etc. you like to remove from your microblogging site.
Step-5 Now from your Dashboard-> Settings-> Reading, under the section front page display; Select Static page as home page and choose Register or Actvity page as home page of your site