QUOTE(AndyH-ha @ Sep 1 2006, 21:44)

Unfortunately not. Phono preamp requirements are significantly different than those of microphones and musical instruments. Those in that soundcard will not produce decent LP playback, even if you managed to make some kind of a hookup to those (quite different than normal HiFi) input jacks.
I believe there are a few soundcards with built-in phono preamps but I would not recommend that as a way to go. There are many stand-alone phono preamps in every price range (probably from less than $20 to certainly well above $20,000). A used receiver, line level preamp, or integrated amplifier will often contain a decent enough phono preamp.
Thanks for the reply. I just learned about the RIAA curves today, which is quite interesting. You learn something new every day! I just bought myself a decent preamp and now need suggestions on a good quality external sound card for my computer. It will obviously need RCA inputs for my preamp. I will be outputting to headphones or speakers. I'm still looking at the M-Audio stuff because a friend of mine has the Firewire Solo and I was very impressed at how clean the headphone out was. I do not need most of the inputs/outputs (XLR and such), however, so something with less frills but excellent sound quality would be best. Any suggestions?