Gd refusing to "get angry" at the Jews during Bilam's attempt to use Hashem's anger to Curse the Jews: Berachot 7a
Potential Inclusion of the Torah Section of Balak in Recitation of Shema: Berachot 12b
Bilam's donkey's ability to speak was created at Sunset of Day 6 of Creation: Pesachim 54a
Bilam was lame in one leg: Sotah 10a
Gd guided Bilam along the path which Bilam wanted to pursue: Makkot 10b
Bilam wanted that which was not his, and so he even lost that which he had: Sotah 9b
Who is great in the next world, according to reports by Titus, Bilam and Jews who sinned while here on earth: Gittin 56b-57a
Bilam's posthumous punishment: Gittin 57a