The only popular use that I know of this date, 08-08-08, is the 29th Olympics in China. Having its open ceremony starting at 8:08pm on this day as a sign of good fortune as the chinese character for 8 represents.
I wonder what other implications are there?
The frequency of similar occurence seems to be a little less than a yearly thing, so it's not too rare: We have 01-01-01 to 12-12-12 and 2-22-22, 2-2-22 to 9-9-99 every ten years or so.
What is the significance of each of these? Or are they merely dependent on the interpretations of the beholders?
Anyway, I can already see how one can use this to motivate himself or others in various fields, such as mathematics, etc.