tweetcasting 

Live tweeting an event on the social networking site twitter. This usually involves tweeting with a hashtag for the event. Others search for the hashtag and then see all of the tweets with that hashtag.

During the South by Southwest conference Jill was tweetcasting the event by tagging all of her tweets related to the event with #SXSW

tweetcasting by MJ Christenson October 31, 2013

tweetcrastinate 

How tech geeks procrastinate: randomly updating their twitter account over and over and over and over…usually with boring updates.
Combo of procrastinate and tweet.

Tech geek online: Today, I got bored and decided to tweetcrastinate. Ha. Ha. Ha.

tweetcrastinate by chocolate chocobo November 29, 2009

twitcasting 

Using twitter to comment on, or summarize an event, while it is ongoing. By restating what a speaker has said, posting quotes, or adding original reflections, the 'twitcaster' plays a similar role to a sports commentator.

Twitcasting provides an opportunity for attendants of an event to communicate with each other and share reactions about a speaker, while the presentation is ongoing.

The speaker encouraged 'twitcasting' by providing the hastag of the conference before getting started.

twitcasting by vllhmn July 25, 2011