edit 11/3/2009 - I'll use this post to keep track on gold and silverstars I'll be attempting.

Acquire two sets of Master materia
Master Materias 0/6
Beat the game
Mideel, Disc 2
Acquire all level 4 limit breaks (including Aeris)
Cloud: 5/7 Aeris: 7/7 Tifa: 5/7 Barrett: 4/7 RedXIII: 4/7 Yuffie 4/7 Cait Sith: 1/2 Cid: 2/7 Vincent: 1/4
Acquire all 4 Huge Materias
Huge Materias 0/4
Breed a Gold Chocobo
Sidequest not started
Aquire Final Attack at the Battle Arena
Not done yet
Post the best score for Snowboard, Motorcycle and Submarine mini-game
Motorcycle: 16000
Submarine: N/A
Snowboard: N/A
Defeat Ruby & Emerald weapons
not done yet
Acquire all characters ultimate weapons
Weapons 1/9
Aquire all Enemy Skills
Enemy skills 14/24