As I run an iBook, and I want to test things in -mm trees, I maintain
my own kernel by applying Benjamin Herrenschmidt -ben* patch and
almost everything that is not non-ppc architecture exclusively
specific; my kernel is basically a 2.6.1-rc3 with most of 2.6.1-rc2-mm1 changes
and all Ben's changes. If you want my series file, I can provide it.
I write this to report plain success with udev and alsa,oss  nodes, and mouse
nodes.

matt@rivendell:pts/2 $ ls /udev
agpgart   hda1   kmem    random      tty14  tty29  tty43  tty58    vcs5
apm_bios  hda10  kmsg    rtc         tty15  tty3   tty44  tty59    vcs6
audio     hda11  mapper  sequencer   tty16  tty30  tty45  tty6     vcs7
cdrom     hda12  mem     sequencer2  tty17  tty31  tty46  tty60    vcsa
console   hda13  mice    snd         tty18  tty32  tty47  tty61    vcsa1
core      hda14  mixer   sndstat     tty19  tty33  tty48  tty62    vcsa2
dsp       hda15  mouse0  stderr      tty2   tty34  tty49  tty63    vcsa3
dvd       hda2   mouse1  stdin       tty20  tty35  tty5   tty7     vcsa4
event0    hda3   mouse2  stdout      tty21  tty36  tty50  tty8     vcsa5
event1    hda4   mouse4  tty         tty22  tty37  tty51  tty9     vcsa6
event2    hda5   null    tty0        tty23  tty38  tty52  urandom  vcsa7
event3    hda6   nvram   tty1        tty24  tty39  tty53  vcs      zero
fb0       hda7   pmu     tty10       tty25  tty4   tty54  vcs1
fd        hda8   port    tty11       tty26  tty40  tty55  vcs2
full      hda9   psaux   tty12       tty27  tty41  tty56  vcs3
hda       hdb    ptmx    tty13       tty28  tty42  tty57  vcs4


matt@rivendell:pts/2 $ ls /udev/snd
controlC0  pcmC0D0c  pcmC0D0p  seq  timer

I tried, weeks ago, some patches to get sound nodes in /udev btu it
gave me some weird oopses. Currently, it works great :)
Notice that I don't get any more oops with sysfs-add-vc-class.patch
applied.
Congratulations for giving us such a fun kernel :)

-- 
Mathieu Segaud

"Talk is cheap. Show me the code."

	- Linus Torvalds