1 This is aim64, a clone of macppc (just 64 bit).  Here is what the arch hierarchy
2 looks like:
3 
4  socppc         macppc                     aim64        power
5     \             /                           \          /
6      \           /       (architectures)       \        /
7       \         /                               \      /
8         powerpc                                 powerpc64
9              \                                  /
10               \                                /
11                \                              /
12                 \                            /
13                   /usr/src/sys common kernel
14 
15 
16 As you can see aim64 is based on powerpc64.  power is not even on the radar
17 yet.  But people have already given support in hardware donations.
18 
19 aim64 focuses on the PowerPC 970 CPU which is Macintosh PowerMac G5.  Any 
20 other computer would have to be in it's own branch (Sony PS3 perhaps?)
21 
22 Regards,
23 -peter