Twittering

I read in the Courier Mail recently that the retention rate for Twitter is low - I imagine that Twittering would be quick but also require persistence on the part of both writer and reader.
Do people who follow blogs lose interest?
How do libraries ensure that where they post is useful and followed?

I guess promotion of the blog itself as well as the library service.
And time for the staff to develop great informative content.

Programs that are already being developed can be marketed in a number of ways - word of mouth, paper flyers, newspaper and internet site. Once you have one flyer, the content is easily transferable to another media. So the work done is spread in several directions to make sure the public get to know what is being offered.

I found an interesting blog on colour print production recently and left a question about a problem I have printing digital art. I am eagerly hoping the blog owner will be kind enough to help me.......Hmm, a live reference service that is available over the internet - have any of us got one up and running and how is it best run?