Vaseline/uranium glass is cool looking. I have a few display pieces.

Another source of radioactive antiques are things made of jadeite.

safe bet that anything older then 40 years old, glass or glass-like, and florescent is probably doped with something unsafe -- but they still make wonderful trophies.

Sadly my military USSR watch with radium painted arms has faded away and no longer glows. The machined trefoil on the back lid of it is still pretty cool, though.

Also, the article mentions it briefly, but radiation is one of the things to worry about least when using vintage ceramic goods. Those glazes are jam-packed with metals that are well known to be carcinogenic now-a-days.