I made use of a new graph type in Google Docs to make a little movie of how much data MAST, the Multimission Archive at Space Telescope has in house and how much it delivers.
The movie spans the 2001-2008 (till today) period.
On the x-axis I have the available data in the archive, while the y-axis has the data distributed to the public. Both axes are log of GB
Here's a screenshot:
Here's the movie (quality not too good on youtube):