Dilution of shares by half during the intervening period.
Current run:
~3c to 21c, 700%
If you factor in the massive run on just about any share during 2006/2007 it's not unreasonable to look at the 700% current run as being much larger than the previous run considering investors are much more conservative at this time.
If you truly believe in this company then that's fine and your decision. If your looking for a massive share price run based on continued speculation you may have already missed the boat.
God luck to all.
GDN Price at posting:
19.0¢ Sentiment: None Disclosure: Not Held