Based on the latest Famitsu hardware numbers...
PSP comparisons: After 205 weeks, PSP is where PS2 was at 152.5 weeks (January 29, 2003), where DS was at 91.5 weeks (August 30, 2006), and where GBA was at 136.3 weeks (October 28, 2003).
X360 comparisons: After 153 weeks, X360 is where GCN was at 14.9 weeks (December 23, 2001), where PS3 was at 18.5 weeks (March 15, 2007), and where Wii was at 4.0 weeks (December 24, 2006).
PS3 comparisons: After 105 weeks, PS3 is where PS2 was at 23.2 weeks (August 7, 2000), where PSP was at 54.2 weeks (December 20, 2005), where GCN was at 106.0 weeks (September 21, 2003), and where Wii was at 25.2 weeks (May 22, 2007).
Wii comparisons: After 102 weeks, Wii is where GBA was at 90.7 weeks (December 13, 2002), where DS was at 71.0 weeks (April 9, 2006), where PS2 was at 100.2 weeks (January 28, 2002), and where PSP was at 155.8 weeks (December 1, 2007).
DSi comparisons: After 2 weeks, DSi is where GBASP was at 3.0 weeks (March 2, 2003), where GBM was at 4.5 weeks (October 13, 2005), and where DSL was at 3.1 weeks (March 19, 2006).
Based on the latest Media Create hardware numbers...
DS vs PSP: Weekly shares of 70.0 / 30.0 bring total shares to 69.0 / 31.0. If DS stopped selling and PSP continued at this week's rate, it would catch up in 347.7 weeks (July 18, 2015).
X360 vs PS3: Weekly shares of 31.4 / 68.6 bring total shares to 23.8 / 76.2. If PS3 stopped selling and X360 continued at this week's rate, it would catch up in 208.7 weeks (November 16, 2012).
PS3 vs Wii: Weekly shares of 39.4 / 60.6 bring total shares to 25.8 / 74.2. If Wii stopped selling and PS3 continued at this week's rate, it would catch up in 261.3 weeks (November 19, 2013).
Week over week, there's again no overall trend. DS coming down from the DSi bump is again the most noticeable thing.
DS passes 24 million.
Should've noticed this two weeks ago, but PSP has already topped its previous best yearly total.
This is also true for X360 as of this week.
Famitsu Software Stuff
New software group: Kirby
The new Kirby has started off stronger than any within the scope of my database. Actually, its first week is bigger than any other game's two-week total. It's also worth noting the two top Kirby games here were also late October or early November releases.
Chocobo's Dungeon + (3255) on DS is doing worse than both the Wii original it's based on (2695), and DS's Chocobo Tales (148). Those two were both mid-December releases, though.