Is this another one of those for-sale-low-/.-UID accounts? Sometimes I wish I had weaker memory.
(a) Only old people used GNOME. XFCE or LXDE for the easy wins, plus openbox, e, or even KDE if you're a glutton for punishment. Plus, others for the asking.
(b) X has become so good that a configuration file is simply not needed for a single-monitor user. I've only encountered one machine in the past 4 years where X didn't work, and that was for a video card/mobo combination that wouldn't even display console (a pizzabox PowerPC (Damn you, Apple!)).
(c) Skype can't figure out the mike, yet audacity does, and audacity isn't written specifically for linux. I'd be pinning the blame closer to skype than the libraries.
(d) Now you're just making shit up. Kaddressbook (Kontact is merely a front-end for a set of programs) imports/exports in CSV, vCard, LDIF, and a couple other formats I've never heard of before looking into this.
At which point, I give up. I bet you feel validated as a troll because I wasted 30 second researching and a moment or two typing. At least it was a canonical troll, false notions presented in a plausible manner, rather than flamebait, designed to incite emotional reaction.