I've created a Twitter account which aggregates content in the MUD community (here, TMC, TMS, MudGamers and the general MUD section of gammon.com.au).
The goal of this is not to obtain followers or the sort. Twitter is often spidered by various places including Google. My goal is to get MUDs more known to the general public. Not just by people looking on Twitter for various things (and finding the Twitter account with a related post), but outside Twitter too. Here's an example: http://i.imgur.com/lk0oL.png
If you have any suggestions for more MUD sites for it to aggregate, let me know. Currently it doesn't pull in RSS from TMC forums (the RSS updates per post, which causes duplicates. Iccy said he'll try to work out a new feed for me) and MudBytes (AFAIK, there is no topic feed; only post feed).
If you know of any Twitter accounts that are specifically for anything related to MUDs, let me know and I'll have MUD_News follow it.