Even my hardcore (former) gamer friends around my age have never heard of it....
I remember spending all night on many Friday/Saturday mornings playing it with a small group of friends when I was a senior in high school. We used to use vodka for hit points...LOL - Pass out and you were dead...
Good times.
Col Sanders
Traveller still has a sizable fan community. The 4th edition was largely a failure but it has been adapted for GURPS quite successfully and an adaptation to the D&D-like d20 system (called "T20") has recently been released. See this site or do a search for "Traveller RPG" in a search engine if you want to know more. If you want to see some really neat graphics, take a look at this web site and look at the Traveller Gallery.