The 06/06/06 will be approximately as catastrophic or interesting as Y2K.
A big fuss and nothing else.
Besides
Gregorian: Tuesday, 6 June 2006
Mayan: Long count = 12.19.13.6.10; tzolkin = 6 Oc; haab = 3 Zotz
French: 18 Prairial an 214 de la Révolution
Islamic: 9 Jumada I 1427
Hebrew: 10 Sivan 5766
Julian: 24 May 2006
ISO: Day 2 of week 23 of 2006
Persian: 16 Xordad 1385
Ethiopic: 29 Genbot 1998
Coptic: 29 Bashans 1722
Chinese: Cycle 78, year 23 (Bing-Xu), month 5 (Jia-Wu), day 11 (Bing-Yin)
Julian day: 2453893
Day of year: Day 157 of 2006; 208 days remaining in the year
Discordian: Boomtime, Confusion 11, Year of Our Lady of Discord 3172
And Japanese, and some other calendars as well ..
The only interesting part was that Steve announced the transition to Intel processors on 6 June 05, to be within a year. Heh. I figured it would have been exactly in one year of that.