http://archiveteam.org/index.php?title=Wikipedia
Not sure what I'd do with the other four gigs.
Assuming that you do use the microsd, I would use two different physical cards, incorporate multiple copies of whatever I choose to include on each of the microsd cards, and add in some heavy duty error correction codes so degraded content can be recovered.
Oh, one more thing, it might be a good idea to use a card that has write protection so that revisionist history is difficult.
eg, http://www.paperinternet.org
The biggest problem with time capsules is that people forget where the damned things are.
2) If there is some space left, I would like to keep information, designs, code, etc of important products.
Either I can use the time-capsule as a safe backup and come back to it in 60 years. Or someone else will find it in another time (far distant future) and it will be an important archeological find. Oh to be immortal.
Then chuck wikipedia on there, and maybe a dictionary.
1) Random data. Hopefully they find an 8Gb memory stick in a mysteriously impervious container, fille with heavily compressed or encrypted data (heh heh) and it becomes a notorious puzzle.
2) Sell the space.
- Text of One Hundred Years of Solitude
and random crap.