Based on the latest Famitsu hardware numbers...
PSP comparisons: After 206 weeks, PSP is where PS2 was at 153.3 weeks (February 4, 2003), where DS was at 91.7 weeks (September 1, 2006), and where GBA was at 137.9 weeks (November 8, 2003).
X360 comparisons: After 154 weeks, X360 is where GCN was at 15.0 weeks (December 23, 2001), where PS3 was at 19.0 weeks (March 18, 2007), and where Wii was at 4.0 weeks (December 24, 2006).
PS3 comparisons: After 106 weeks, PS3 is where PS2 was at 23.6 weeks (August 10, 2000), where PSP was at 54.4 weeks (December 21, 2005), where GCN was at 107.7 weeks (October 3, 2003), and where Wii was at 25.6 weeks (May 24, 2007).
Wii comparisons: After 103 weeks, Wii is where GBA was at 90.9 weeks (December 14, 2002), where DS was at 71.2 weeks (April 10, 2006), where PS2 was at 100.5 weeks (January 31, 2002), and where PSP was at 156.2 weeks (December 3, 2007).
DSi comparisons: After 3 weeks, DSi is where GBASP was at 4.7 weeks (March 14, 2003), where GBM was at 11.8 weeks (December 2, 2005), and where DSL was at 3.7 weeks (March 24, 2006).
Based on the latest Media Create hardware numbers...
DS vs PSP: Weekly shares of 63.7 / 36.3 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 217.4 weeks (January 24, 2013).
X360 vs PS3: Weekly shares of 47.0 / 53.0 bring total shares to 24.0 / 76.0. If PS3 stopped selling and X360 continued at this week's rate, it would catch up in 107.8 weeks (December 18, 2010).
PS3 vs Wii: Weekly shares of 33.1 / 66.9 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 262.5 weeks (December 5, 2013).
Week over week, PS2 and PS3 are pretty flat, but everything else is ramping (or bumping) up.
Wii passes 7 million.
Famitsu Software Stuff
Last week the new Kirby (3265) did better than any other modern Kirby through two weeks. Now after two weeks it's doing better than any other modern Kirby through four weeks, and just barely misses making it five. It also passes up Canvas Curse altogether.
Through its first few weeks, Wii Music was holding on to a greater percent of its opening sales on a weekly basis than last year's Super Mario Galaxy, but that changes with week five. Though SMG launching slightly later in the year, its week five is further into the normal holiday bump.
Some new software groups:
Way of the Samurai
Way of the Samurai 3 (3272) opens with a first week just slightly below the original (1434), and well above Way of the Samurai PSP (3189) and Samurai Western (2070).
Shiren DS 2 (3274) opens nearly 40% lower than its predecessor from last year (155), though last year's game has an advantage being a late December release. Also a slightly weaker opening than this June's new Wii Shiren (2984).
Resistance 2 opens up with a much stronger first week than the original. I'm sure having a userbase of more than 90K this time around helps.
Mega Man Star Force
Mega Man Star Force 3 (3273) starts out just below the original (218) and the second (2665). The second ended up doing far less than the original, though, so it's hard to say where 3 will go from here.