I thought this might be some handy info for you guys:
The following moves can effectively shield stab
NAir, UTilt, UAir
The following moves are O.K. at shield stabbing
DTilt, USmash
The following moves have too low of "shield knockback", and can get you grabbed
USmash, Dash Attack, Neutral A
Sour Spot Jump Kick, N-Air
Nayru's Love, Farores Wind
The following moves are generally safe from being shield grabbed
FSmash, DSmash, FTilt, UTilt
Sweet Spotted Kick, D-Air, U-Air
These can vary slightly if a character has an exceptional grab range.. perhaps somebody like ivysaur or link can shield grab you anyway.
If any corrections need to be made let me know and I will edit the OP.
The following moves can effectively shield stab
NAir, UTilt, UAir
The following moves are O.K. at shield stabbing
DTilt, USmash
The following moves have too low of "shield knockback", and can get you grabbed
USmash, Dash Attack, Neutral A
Sour Spot Jump Kick, N-Air
Nayru's Love, Farores Wind
The following moves are generally safe from being shield grabbed
FSmash, DSmash, FTilt, UTilt
Sweet Spotted Kick, D-Air, U-Air
These can vary slightly if a character has an exceptional grab range.. perhaps somebody like ivysaur or link can shield grab you anyway.
If any corrections need to be made let me know and I will edit the OP.