I don't think twitter really counts as blogging. It is too low signal/noise and doesn't leave enough room to seriously cover anything "academic" other than link

I don't think twitter really counts as blogging. It is too low signal/noise and doesn't leave enough room to seriously cover anything "academic" other than linking to real blogs and articles For actual blogging, there are a few considerations you need to take into account. One is that academics will probably only blog if it can help their career in some way. If you are a graduate student or associate professor it's probably very low on your list of priorities - it also has a long payoff time as you build up a following whereas a good publication has much more immediate benefits. Another consideration is that for blogging to be worthwhile, there needs to be a low number of producers for every X consumers. Right now I think academic blogging doesn't have enough producers, but the size of the consumer market is limited, so I don't think it makes sense for everyone to blog