Selective Amnesia
After a potentially lethal fall, the freedom fighters discover that
Sally has lost her memory.  But Sonic and his two-tailed compadre
begin to get more than suspicious when they find that she hasn't
forgotten everything... The events eventually go contradictory to
origional plans, and the freedom fighters see themselves back where
they started: in danger.
A lot of fanfic fails if the characters are off, and Matt managed to get it 
right. This story of a best-laid plan spinning out of control also answers a 
question posed by Sonic fan Richard Smyers: "Does Sally have ANY character 
flaws?" Once again, Matt, great job.