Only thing I can come up with is to create your own little programme and get people to use it, so it monitors the stats via memory when they are playing and then sends that info to your website to update it. Obviously convincing people to use this wouldn't be easy as they might think you are sending more than just the WvW stats.
If GW2 had usage for addons it would be easier as people are very used to just using an addon and not really thinking about what else it does but I don't know of any addon usage type system for GW2.
I know you said you didn't want it from memory but I'll add the pointers anyway just in case.
all 4byte decimal values
Code:
Base = [[[[ 0x15AF5E0 ] + 0xC] + 0x24] + 0xF4]
server current score = Base + 0x50
server current +score = Base + 0x54
server pos on screen 1,2,3 = Base + 0x58
server current score = Base + 0x70
server current +score = Base + 0x74
server pos on screen 1,2,3 = Base + 0x78
server current score = Base + 0x90
server current +score = Base + 0x94
server pos on screen 1,2,3 = Base + 0x98
Didn't get the server names, might have a look later if you need them.