Archive.is saves your URL on demand.
it allows you to create a copy of any web page that you can share and view any time knowing it will last forever
it saves textual and graphical copy of the page
it can save pages from Web 2.0 sites
it can save pages with hashbang urls (ie http://twitter.com/#!/medvedevrussia or
http://wikimapia.org/#lat=60.7864688&lon=29.4435298&z;=15&l;=1&m=b)
it has advantage over URL shorteners: page will not disappear
the saved page has no active elements and no scripts so cannot have any popups or malware