Jim-Here's a list of the releases thus far, I have also included mintages. I do have the entire collection as of this point. It is my understanding that the Aladdin is also planning a hologram series but of a shorter duration than the zodiac series currently at the Riviera:

2001:
Valentines' Day

Independence Day

Halloween

Thanksgiving

Christmas

2002:
Winter Olympics 2002

Skiing

Snowboarding

Hockey

2002:
Zodiac Series (As of 3-25-02)

Aries

I understand that there is also planned a holiday release of holograms at the Riviera starting with April Fool's Day for 2002.

Hope this helps and saves you some leg work.