Is a cohesive, specific resource of such available? So as to potentially not make this thread wholey unhelpful from the start for others looking for information like me, various changes I've seen scattered on different sites,
*Lightningrod grants +1 sp.atk when hit by an electric move and negates the damage. I feel it's a safe assumption Storm Drain has been changed in a similar way
EDIT: Found some move changes
http://www.gamefaqs.com/boards/989552-pokemon-black-version/56420999
Some that stand out,
*Thunder Wave does hit ground pokemon
*Toxic, accuracy 90%
*Rock Blast, accuracy 90%
*Icicle Spear, BP 25
*Bullet Seed, BP 25
And I now have an excuse to finally use the fun gimmick moves Disable and Future Sight.
*Lightningrod grants +1 sp.atk when hit by an electric move and negates the damage. I feel it's a safe assumption Storm Drain has been changed in a similar way
I was able to compile a list of Power, Accuracy, and PP changes in old moves. I bolded the improvements and italicized the drops as well, with the old values in parenthesis. Be aware that I may have missed some, so point them out to me if you realize it:
Jump Kick: 100 Power (from 85), 10 PP (from 25)
Tackle: 50 Power (from 35), 100 Accuracy (from 95)
Wrap: 90 Accuracy (from 85)
Thrash: 120 Power (from 90), 10 PP (from 20)
Disable: 100 Accuracy (from 80)
Growth: Raises Sp.Atk and Atk one level.
Petal Dance: 120 Power (from 90), 10 PP (from 20)
Thunder Wave: Now hits Ground type foes.
Toxic: 90 Accuracy (from 85)
Hi Jump Kick: 130 Power (from 100), 10 PP (from 20)
Glare: 90 Accuracy (from 75)
Crabhammer: 90 Accuracy (from 85)
Scary Face: 100 Accuracy (from 90)
Outrage: 10 PP (from 15)
Giga Drain: 75 Power (from 60)
Fury Cutter: 20 Power (from 10)
Future Sight: 100 Power (from 80), 100 Accuracy (from 90), 10 PP (from 15)
Whirlpool: 35 Power (from 15), 85 Accuracy (from 70)
Uproar: 90 Power (from 50)
Sand Tomb: 35 Power (from 15), 85 Accuracy (from 70)
Bullet Seed: 25 Power (from 10)
Icicle Spear: 25 Power (from 10)
Covet: 60 Power (from 40)
Rock Blast: 90 Accuracy (from 80)
Doom Desire: 140 Power (from 120), 100 Accuracy (from 85)
Last Resort: 140 Power (from 130)
Drain Punch: 75 Power (from 60), 10 PP (from 5)
Magma Storm: 75 Accuracy (from 70)
I also included Growth and Thunder Wave whose new effects are pretty well-known now. Undoubtedly there will be many changes in the effects of moves that will need testing.
EDIT: Found some move changes
http://www.gamefaqs.com/boards/989552-pokemon-black-version/56420999
Some that stand out,
*Thunder Wave does hit ground pokemon
*Toxic, accuracy 90%
*Rock Blast, accuracy 90%
*Icicle Spear, BP 25
*Bullet Seed, BP 25
And I now have an excuse to finally use the fun gimmick moves Disable and Future Sight.