Ableton just posted "Solid Sounds". It's a free Live Pack for registered Live/Live LE users and contains over 400 MB of content featuring 400 loops, 128 Simpler presets and 12 creative instrument Racks in a variety of musical styles. The library was created in collaboration with Loopmasters.
Samples are loaded under "Samples->Loopmasters".
Simpler presets are under "Instruments->Simpler->Loopmasters".
Racks are under "Instruments->Instrument Rack->Loopmasters".
The racks are setup so that Macro knob 1 allows you to quickly scroll through layers in a rack. Very cool!
Download this free Live Pack from http://www.ableton.com/solid-sounds.