well i am going to be a supporter of twitter and say that I use it at least once or twice a day. it come in handy (for me at least) for news and finding new things. the other reason why i use it is because it allows me to link it into my Facebook, Myspace and Google Buzz feeds so it will update them at the same time. Personally I think twitter is fantastic

as for Grackle68k, it use it when ever my G4 is hooked up to the internet.