Missiles? no
Depleted Uranium slugs/bullets yes. The weight to size ratio make them supurb tank killing weapons. And as such it will contiune to be used until enough outcry has been made to out weigh its benifits.
"Depleted uranium is chemically toxic. It is an extremely dense, hard metal, and can cause chemical poisoning to the body in the same way as can lead or any other heavy metal. However, depleted uranium is also radiologically hazardous, as it spontaneously burns on impact, creating tiny aerosolised glass particles which are small enough to be inhaled. These uranium oxide particles emit all types of radiation, alpha, beta and gamma, and can be carried in the air over long distances. Depleted uranium has a half life of 4.5 billion years, and the presence of depleted uranium ceramic aerosols can pose a long term threat to human health and the environment.
Depleted uranium is also used in civilian products. For example, it is used as ballast in aeroplanes (having disastrous consequences in 1992 when an El-Al jet crashed into flats near Amsterdam - depleted uranium was also involved in the recent Stansted Korean Air crash - see CADU News issue 3 for full report). It is also used in some hospital equipment. The alarming Euratom (European Atomic Energy Community) objective which will allow the 'recycling' of low-level radioactive waste in to consumer goods has also raised concerns that depleted uranium may be used in this way."
"Making weapons and other items out of the waste products of the nuclear business is a very 'convenient', very cheap, but potentially deathly way to get rid of the nuclear waste stockpiles"
REading here:
http://www.cadu.org.uk/whatisdu.htm