Monster Hunter Portable 2G delivers a monstrous opening day. The previous installment was only 512k first day. Of the 670k, 17k were the bundled version, so expect a good rise in the PSP numbers for the upcoming week.
First day sales
PSP Monster Hunter Portable 2nd G - 670,000
MHP2 did 512k first day, so this is PSP biggest seller ever on first day.
652k were normal editions, 17k Hunter's Packs.
Impressive 80% sell through too.
EDIT: a few more bits:
PSP Monster Hunter Portable 2nd G - 670,000 (80% sell through)
NDS Kidou Senshi Gundam 00 - 30,000 (50% sell through)
PS2/PSP Code Geass: Hangyaku no Lelouch - Lost Colors - 14,000 (70% sell through)
PS2 Guilty Gear XX Accent Core Plus - 10,000 (regular+append versions)
NDS Lux-Pain - 8,000 (20% sell through)
360 Dark Sector - 5,000
PS2 Sega Ages 2500 Series Vol. 32: Phantasy Star Complete Collection - 3,000
360 Raiden Fighters Aces - 3,000
NDS Tetsudou Seminar: JR-Hen - 3,000
PSP Umihara Kawase Portable - 1,800 (20k shipment)
PS3 Lego Star Wars: The Complete Saga - 1,500
WII Lego Star Wars: The Complete Saga - didn't make it (<1000?)
PS2 Tomb Raider: Anniversary - 1,500
360 Tomb Raider: Anniversary - 1,000
PSP Tomb Raider: Anniversary - didn't make it (<1000?)
WII Tomb Raider: Anniversary - didn't make it (<1000?)
This is off neogaf.
Currently playing on PS3: God of War III
Currently playing on Xbox360: Final Fantasy XIII
Currently playing on NDS: Chrono Trigger