funDiva Christy: I've never seen Endless Tweets before but if I can find some time I'll have a look.

As for more than 5 ignorable usernames.. possibly, there's no real reason why there has to be any limit although the user interface I have in my head for this currently clashes with my Javascript abilities.

Hm, sorry, I should've been explicit:

On installing and viewing your Twitter home page, you need to go to the Greasemonkey menu in Firefox -> User Script Commands -> Edit Usernames. A dialog box will then appear to allow you to edit the Twitter names you want to ignore.

I and plenty of people I know love Twitter, but occasionally you'll get people who fill up your tweet list with all sorts of rubbish - temporarily or otherwise. This script lets you ignore them, but doesn't stop you following them permanently - thus avoiding any potential social awkwardness..

My browser JS sucks so I haven't bothered with any flashy UI. Maybe I'll find the time to make it a bit slicker.