I've talked before about Awesome Highlighter and its nice feature that will copy portions of text that you can send in an email or send as the highlighted page.
This new application iCyte seems to do something similar but maybe goes one better.

From Jane's E-Learning Pick of the Day:

"Cyte enables you to highlight and save text on any webpage, allowing you to recall the most relevant information. You can save sections of webpages or the whole thing. Webpages you Cyte are saved forever on the server, letting you return to your research even if the webpage has been deleted or modified. iCyte is free and works with popular browsers. Firefox 3 or Internet Explorer 7 or 8 are required to save webpage content using iCyte."