1) 1280X1024, 32 Bit on this monitor, mostly, and tweaked with Adobe Gamma Corrector and NVidia Controls, though for some things (that don't involve fonts much
) I kick it to 1600X1200. My other machines, and my laptop, are usualy at 1024X768, 32 Bit or 1280X1024 32 Bit.
2) IE6, MSN 8, NS 7, Opera 6.0 and 7.2, and even old IE 5.5, depending on machine and what I'm doing. Some websites work better in NS than IE, but not very many. I've found Opera has problems of various sorts with a number of websites that display fine in any version of IE and most versions of NS.
3) Other than a 14.1" laptop, all my screens are 17" or larger (this one's a 21" CRT), and I rarely feel a need to use "Full Screen", even though I have scrolling tickers at tops and bottoms of the screens.