Here's a good set of BBC reports on the dangers of DU
http://news.bbc.co.uk/1/hi/in_depth/europe/2001/depleted_uranium/default.stm Fresh evidence has come to light of long-standing military concern about the potential health effects of depleted uranium (DU).
Documents obtained by the BBC suggest that the United States military was concerned about weapons containing DU even before the Gulf War, exactly 10 years ago.
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And of course... our own military has a page shooting down all of the myths about DU:
Military FAQ on depleted uranium.
http://www.gulflink.osd.mil/faq_17apr.htm