Well, the only folders I am symlinking are the Data, Interface, Screenshots and the WTF folders, so everyone can have their own configuration.

The Data, Interface and Screenshots folders are on my file server and every client shares those folders. As for the WTF, I created a folder called D:\Games\WoWData\[ToonName] so every toon has their own individual setup.
Well, I actually don't recommend sharing any folder inside the Account folder, because, once you leave WoW, it saves every variable to the SavedVariables files and if more than one client is accessing those .lua files, they might get corrupted and you'd lose information. So I suggest creating either a share folder, where every Account folder resides in or just keep the WTF folders unshared...

Example:
Code:
 Directory of D:\Games\WoWData

07/15/2008  05:20 PM	<DIR>      	Gleda
Every WoW client looks just like this:
Code:
 Directory of D:\Games\Gleda

05/04/2008  05:40 PM	<DIR>      	Cache
06/09/2008  10:40 PM	<SYMLINKD> 	Data [\\Server\sda\Games\WoWData\Data\]
07/05/2008  04:11 PM	<DIR>      	Errors
06/09/2008  10:41 PM	<SYMLINKD> 	Interface [\\Server\sda\Games\WoWData\Interface\]
07/15/2008  04:57 PM	<DIR>      	Logs
06/09/2008  10:41 PM	<SYMLINKD> 	Screenshots [\\Server\sda\Games\WoWData\Screenshots\]
06/17/2008  12:52 PM	<DIR>      	WDB
05/31/2008  09:46 PM	<SYMLINKD> 	WTF [D:\Games\WoWData\Gleda\]
07/15/2008  04:56 PM     	1,069,712 BackgroundDownloader.exe
04/01/2008  10:34 PM        	30,923 Burning Crusade Install Log.html
04/02/2008  01:02 AM     	1,039,728 dbghelp.dll
04/01/2008  10:23 PM       	413,696 DivxDecoder.dll
04/01/2008  10:32 PM       	372,736 ijl15.dll
07/15/2008  04:56 PM     	1,753,744 Launcher.exe
07/15/2008  04:56 PM        	43,208 Patch.html
07/15/2008  04:56 PM       	804,802 Patch.txt
07/15/2008  04:56 PM            	88 realmlist.wtf
07/15/2008  04:56 PM       	881,296 Repair.exe
07/15/2008  04:56 PM        	42,244 Scan.dll
04/01/2008  10:23 PM       	245,408 unicows.dll
04/01/2008  10:13 PM        	13,680 World of Warcraft Install Log.html
07/15/2008  04:56 PM     	8,272,528 Wow.exe
04/01/2008  10:36 PM     	1,033,022 WoW-2.4.0-enUS-downloader.exe
04/02/2008  01:02 AM   	968,606,383 WoW-2.4.0-enUS-patch.exe
Code:
 Directory of S:\Games\WoWData

06/09/2008  11:12 PM	<DIR>      	AllAccounts
06/09/2008  10:57 PM	<DIR>      	Chrysanthe
07/15/2008  04:57 PM	<DIR>      	Data
06/09/2008  10:52 PM	<DIR>      	FullInterface
06/09/2008  10:58 PM	<DIR>      	Gleda
06/23/2008  06:19 PM	<DIR>      	Interface
06/09/2008  10:59 PM	<DIR>      	Nealie
06/09/2008  10:58 PM	<DIR>      	Pruedence
07/16/2008  07:51 PM	<DIR>      	Screenshots
06/09/2008  10:58 PM	<DIR>      	Zarryiosiad
Inside the AllAccounts and FullInterface folders I keep all the data for singl-boxing. However, both folders have outdated data inside, since I haven't been single-boxing in ages :P

(S:\ is my file Server)

..hope that helps you deciding a little