So far it seems yes. There's a reasonably established alternative at identi.ca, but so far it mainly has users who're there for "ideological" reasons, so it's a

So far it seems yes. There's a reasonably established alternative at identi.ca, but so far it mainly has users who're there for "ideological" reasons, so it's a good place to follow e.g. Debian developers, but hasn't succeeded in attracting the broad range of people who use Twitter.