Email, Twitter, and bookmarklets all support rapid task input - what do you seek in a plugin that is not possible with one of the other methods?

superwulf,

What about the RTM bookmarklet? See http://www.rememberthemilk.com/help/answers/quickadd/firefox.rtm

Does not allow you to set repeat values, time estimates, location, priority, url.....

for email or twitter you have to go to those pages, might as well go to the rtm page. the bookmarklet would be great if it offered all the fields.

Ubiquity has great rtm-integration. I love it :D

mehardin,
you can also get a bookmarklet that uses the mobile site to add tasks. You get those fields (and it uses your current URL, which makes it great for adding tasks for webpages).

kottkrig, yes, this is true. :)

I think it will be great to have extension which can add a new tasks by selecting text in web page with context menu "Add to Remember The Milk!". I think it is very easy to implement. Very often I use copy-paste for it, it is very uncomfortably. All mobile platforms have "sent to" option.

I made one, https://addons.mozilla.org/en-US/firefox/addon/moo-later/

I still have more features to add but comments are welcome.