Actually, for a Sorcerer, Int. is not important. It doesn't affect how many spells you can cast or learn (acquire, actually). According to 2ED pNp rules, Charisma is the most important stat for a Sorcerer; again in BG2, it has no effect on how many spells you can cast, it is fixed (barring magical items).
At level 20, a Sorcerer can cast a spell from each level 6 times. I believe the number of spells learned is:
Lv1: 5
Lv2: 5
Lv3: 4
Lv4: 4
Lv5: 4
Lv6: 4
Lv7: 3
Lv8: 3
Lv9: 3
I had a link to a spell progression chart, but I lost it.
The Ring of Wizardry gives you an extra spell memorization for each spell level from 5 to 7.
Melf's Minute Meteors (great Sorcerer Spell) grants one meteor per level; however, they act as +5 missles and you can throw 5/round. Damage is 1d4 + 1d4 fire damage. I think that they are permanent until used up, but sometimes moving to a new area or shapeshifting makes them disappear.
Sling of Everard is a +5 sling, it creates its own +5 phantom bullets. They are +5 in THAC0, but only +3 in terms of damage, so 1d4 + 3.
------------------
"This place will be your tomb."
[This message has been edited by Xod (edited 06-18-2001).]