Ring Ideas

• Morse code! http://www.fatcowdesigns.com/product.asp?strParents=&CAT_ID=&P_ID=669. Or maybe binary?
  
  
• Swiss cheese! http://www.skaletfamilyjewelers.com/WeddingBands/GoldWeddingBandsMens/00140500080.html
  
  
• Sound wave! http://sakurakoshimizu.blogspot.com/2007/12/waveform-series-2007-waveform-series-is.html
  
  
• Skull and crossbones! http://swanlakejewelry.com/index.php?main_page=product_info&cPath=7&products_id=145
  
  
• Peptides! http://www.thinkgeek.com/blog/2008/10/my-big-ntfs-geek-wedding.html