David Kim has just posted another balance update on the StarCraft II forums, explaining to the community how the game balance is currently looking.
There are two options that the balance team is looking at, both regarding buffing Terran. Option one is to reduce the mineral and gas costs of infantry upgrade levels 2 and 3 by 25 each. Option two is removing the Transformation Servos upgrade and allowing Hellions to transform into Hellbats once an Armory is built. You can read the details and justifications for these proposed changes in the full post, which is fairly short.
Battle.net - Balance Status Update