Panda's Thumb directed me to a great article about visualising microfossils which had been embedded in opaque amber.
ESRF X-rays reveal clues about life 100 million years ago trapped in opaque amber
I love the fact that this non-invasive form of analysis can give a decent first pass look at the gross morphology of hundreds of new microfossils. The video linked at the bottom of the page is definitely worth a look!
TTFN,
WK