There was a new updated landcover dataset announced last week, by the European Space Agency (ESA) and partners.
The data is preliminary at this stage, and it looks like the final result will be released in the summer - I suspect that it will be a quite relaxed license, just like GLC2000. The data comes from MERIS / ENVISAT data acquired in the period May 2005 - April 2006.
I would be interested in hearing how this compares to the True Marble GLCD that was announced a month ago or so. That dataset offers higher spatial resolution, down to 15m (commercial license) or 250m (relaxed license, public access), but I assume that True Marble has much less in terms of ground truthing, review and scientific process - but I might be wrong. I haven't kept up to date with remote sensing and satellites, so I don't know how these compare in terms of sensors/bands for the accuracy, and I haven't looked closely at the legends/classifications used.
300m global landcover preliminary results
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