Based on the latest Famitsu hardware numbers...
PSP comparisons: After 214 weeks, PSP is where PS2 was at 167.3 weeks (May 13, 2003), where DS was at 95.8 weeks (September 30, 2006), and where GBA was at 145.6 weeks (January 1, 2004).
X360 comparisons: After 162 weeks, X360 is where GCN was at 15.7 weeks (December 28, 2001), where PS3 was at 25.5 weeks (May 3, 2007), and where Wii was at 4.5 weeks (December 28, 2006).
PS3 comparisons: After 114 weeks, PS3 is where PS2 was at 30.1 weeks (September 25, 2000), where PSP was at 56.7 weeks (January 6, 2006), where GCN was at 118.4 weeks (December 17, 2003), and where Wii was at 30.0 weeks (June 24, 2007).
Wii comparisons: After 111 weeks, Wii is where GBA was at 93.4 weeks (January 1, 2003), where DS was at 74.6 weeks (May 4, 2006), where PS2 was at 110.2 weeks (April 8, 2002), and where PSP was at 160.9 weeks (January 6, 2008).
DSi comparisons: After 11 weeks, DSi is where GBASP was at 27.4 weeks (August 20, 2003), and where DSL was at 11.0 weeks (May 14, 2006).
Though DSi had the holiday going for it, it and early DSL continue putting out ridiculously similar numbers.
Based on the latest Media Create hardware numbers...
DS vs PSP: Weekly shares of 65.6 / 34.4 bring total shares to 68.8 / 31.2. If DS stopped selling and PSP continued at this week's rate, it would catch up in 328.4 weeks (May 7, 2015).
X360 vs PS3: Weekly shares of 31.6 / 68.4 bring total shares to 24.1 / 75.9. If PS3 stopped selling and X360 continued at this week's rate, it would catch up in 194.5 weeks (October 11, 2012).
PS3 vs Wii: Weekly shares of 39.0 / 61.0 bring total shares to 26.3 / 73.7. If Wii stopped selling and PS3 continued at this week's rate, it would catch up in 238.8 weeks (August 17, 2013).
Week over week, everything is down. Mostly 20-30%, though not so much for PS2 and X360 at the bottom.
Famitsu Software Stuff
Animal Crossing: City Folk (3281) passes 1 million, becoming the 7th Wii game to do so. It's not keeping up with its DS predecessor (95), but what can?
White Knight Chronicles passes 300K, becoming the 7th PS3 game to do so.
I didn't pay much attention to this one in the last few weeks, but Kirby Super Star Ultra (3265) never did fall behind Kirby Squeak Squad (194) in terms of sales at a given time from launch. It remains the best-selling Kirby (at least modern Kirby), is at a point that Squeak Squad took many more months to reach, and should cruise past its total without much trouble.