X360: Let's see. I way lowballed this one last month. Now on the one hand it's hard to imagine it retaining the same rate it reached in September... but on the other it still sounds like things stayed decently high, and September only had half the month for the big Halo 3 effect anyway. Seems like Arcade came in with more of a whimper than a bang. I'm very much in guesstown again when choosing to say it will do 80% as well as last month on a weekly basis. So 527.8 x .8 x 4/5 for weeks = 338K
Wii: Wii has been nothing if not consistent over the last few months, ranging from 100.2K/week to 106.25K/week. I'll go near the middle. 103K/week * 4 = 412K
PS3: It was already headed down. There was nothing major to cause a boost for it until the very end, and I doubt those couple days of 40 GB availability caused a monster spike. People buying cheaper 60/80 GBs is probably canceled by people waiting for the 40 GB. I'll say 90% of last month's weekly rate. 119.4K * .9 * 4/5 = 86K
PS2: Last month it did 43K/week. Little reason for change, but in the long run it's slowly headed down so I'll go with 42K/week. 42K * 4 = 168K
DS: Not quite as consistent as Wii the last few months, but almost. It's been a bit lower than Wii lately, so I'll say 2K/week less than I did for Wii. 101K * 4 = 404K
GBA: The last three months it's been 21.75K/week, 17.375K/week, and 15K/week. It's also on the way out. At that rate it would be down to 0K/week in very short time, though, so I doubt the decrease continues at that pace. I'll say 14K/week. 14K * 4 = 56K
PSP: I overestimated this one last month. Slim was a return to normalcy, not a bump. I'll say it retained the same weekly rate. 284.5K * 4/5 = 228K