haha, yeah. If you're pluggin your guitar straight into the card I suggest you use some sort of software amp simulator/modeller on anything you record. Or if you are using your computer simply for amplification/monitoring while you practice, see if you can run a real-time guitar amp modeller practically on your system (depending on your soundcard, there may be a significant and audible delay if you attempt to do any processing with the computer).

You see, a soundcard does not provide enough impedance for the pickups on an electric guitar to work correctly. The ideal solution would be to put a direct-input box between the guitar and the soundcard. In a pinch I use a small mixer before the soundcard, with the guitar plugged into one of the mic-channels (in order to take advatage of the mic-preamps). Some guitar amps have a line-out jack which you could use. This would essentially run the guitar through the preamp in the guitar amp, then send the signal out before it reached the final amplification stage. This signal could then be plugged directly into your sound-card. BEAR IN MIND that while some amplifiers have a line-out jack (OK), others have a speaker-out jack (NOT OK!!). Never ever ever connect a speaker-out to an input on your soundcard, or you will fry your soundcard.

If none of these options are available to you, don't fret. No damage will be done to your guitar, effects, or soundcard if you plug directly into the soundcard. It just won't sound quite "right", not nescessarily bad, just not "right". Just thought I'd take a minute to help further educate a fellow musician of the ins and outs.