I have no sound in FC 3, Gnome or KDE using CCRMA kernel 2.6.10-2.1.ll.rhfc3.ccrma and there is no difference with 2.6.11-1.14_FC3. KDE gives me this error message when I boot into it;
Sound server informational message:
Error while initializing the sound driver:
device: default can't be opened for playback (No such file or directory)
The sound server will continue, using the null output device.

alsaconf has been run, alsamixer has been set, /usr/sbin/alsactl stored and still NO SOUND. Any ideas anyone?
Thanks.

Go to your KDE control center ->Sound and Multimedia -> Sound system
In the hardware tab.. which Audio Device are you using? It should be set to ALSA. And also make sure that you have write access to all files in the folder /dev/snd.
Can you send us what lsmod shows up?

# /sbin/lsmod
Module Size Used by
lp 12489 0
autofs4 26181 0
sunrpc 164485 1
ipt_REJECT 7105 1
ipt_state 1857 1
ip_conntrack 40601 1 ipt_state
iptable_filter 2881 1
ip_tables 19777 3 ipt_REJECT,ipt_state,iptable_filter
dm_mod 59221 0
md5 4161 1
ipv6 259201 10
usblp 12993 0
uhci_hcd 33497 0
parport_pc 28421 1
parport 40201 2 lp,parport_pc
i2c_viapro 7889 0
i2c_core 21953 1 i2c_viapro
emu10k1_gp 3649 0
gameport 5057 1 emu10k1_gp
snd_emu10k1 110149 2
snd_rawmidi 28641 1 snd_emu10k1
snd_seq_device 8781 2 snd_emu10k1,snd_rawmidi
snd_ac97_codec 71097 1 snd_emu10k1
snd_pcm_oss 51953 0
snd_mixer_oss 18241 2 snd_pcm_oss
snd_pcm 99657 3 snd_emu10k1,snd_ac97_codec,snd_pcm_oss
snd_timer 33093 2 snd_emu10k1,snd_pcm
snd_page_alloc 9669 2 snd_emu10k1,snd_pcm
snd_util_mem 4801 1 snd_emu10k1
snd_hwdep 9185 1 snd_emu10k1
snd 56741 11 snd_emu10k1,snd_rawmidi,snd_seq_device,snd_ac97_codec,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer,sn d_hwdep
soundcore 10785 2 snd
8139too 29505 0
mii 4929 1 8139too
floppy 64753 0
ext3 131145 3
jbd 82777 1 ext3

# /sbin/lspci
00:00.0 Host bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133] (rev 02)
00:01.0 PCI bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133 AGP]
00:07.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South] (rev 40)
00:07.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)
00:07.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 16)
00:07.3 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 16)
00:07.4 Bridge: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev 40)
00:0a.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
00:0b.0 Multimedia audio controller: Creative Labs SB Audigy (rev 03)
00:0c.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 08)
00:0c.1 Input device controller: Creative Labs SB Live! MIDI/Game Port (rev 08)
01:00.0 VGA compatible controller: 3Dfx Interactive, Inc. Voodoo 3 (rev 01)

Try overriding the default device location to /dev/dsp.
Restart the sound system (should refresh artsd) Test for sound.
This should work as you have OSS emulation set up. Again ensure that you have write access to both /dev/snd folder and /dev/dsp
Are you able to get sound if you run as root?