no way I was just looking at your forum account yesterday because I had searched for all posts containing the word "subway" as I'm currently trying to map and connect the subways of kreatious.
As for creeper greif: If someone else explodes a creeper on your property, itll be fixed. If you explode it on your own property, you will need to use /revert or fix it yourself. /revert is a voter command, which means if you vote one day you can use it twice that day. Vote again later that day to get to use it again. /revert is special, however, in that you cant use it RIGHT after you vote, making you vote daily instead of only voting when you want to revert something.
As for map size, it goes from X and Z -5000 to X and Z 15000, so it is 20000x20000 blocks large. All four continents are on the same map, so yes you can walk between them
a minature explination of the map would be
Where OC is the old continent (version 1.0? not sure), NC is the new continent (version 1.4? not sure)
DP and LP are both pandora (version 1.7). DP is dark pandora and LP is light pandora, this doesnt really mean anything anymore but thats what theyre called. (random /homes used to only lead to light pandora, but this has been changed since pandora was added, thats where the naming comes from)
OC is from X and Z -5000 to X and Z 5000
NC is from X -5000 and Z 5000 to X 5000 and Z 15000
Regular (Light) Pandora is from X 5000 and Z 5000 to X 15000 and Z 15000
Dark Pandora is from X 5000 and Z -5000 to X 15000 and Z 5000
So, OC NC DP and LP are all 10000 by 10000 blocks, although pandora is frequently talked about as one continent as it was generated all at once, and really is just one continent with two regions
OC is /oc, NC is /nc OR /spawn, Pandora is /pp
ALSO, look at the map I made! (or ices too)
http://www.kreatious.net/viewtopic.php?f=3&t=3557