I'm not sure I can put myself in the expert category without looking arrogant and seeming like a jerk, but I've helped a few people.
Don't worry I actually enjoying answering and sharing knowledge. I just want everyone to have a computing experience as fun and trouble free as what I can manage for myself. Also there are a few times when I'm sitting there scratching my head going, "Well that doesn't make sense... Wait, what? WHY IS THERE FIRE?!" and someone talks me through something I overlooked or didn't know myself. (Rare after this many years, but it happens. We all forget to properly seat the RAM or some such once in a while.)
So to those with questions, keep asking because we don't mind so long as you're not a complete pill and to those who answer them keep on rocking in the free world.
Netbooks -> Mini 9 - 2gb Gskill low latency - Ubuntu 8.04
Asus Eee 701 4g - 1gb - Ubuntu 8.04.1
Desktops -> Phenom Quad @ 2.8 - 16gb - 4x Raptor X in RAID 0 - 2x 4870X2
Brisbane 1.9 @ 2.7 - 4gb - 80gb
Many others, all Linux.