yes.. E symbolizes edge network available while G for gprs network.

that only means above mentioned networks r available.. doesn't mean connected. if connected, it will show another transferring symbol instead.

some memory was used up for applications that running on background. it's normal.

PS: ur 818pro is quite new! new dopod logo some more..

haha... don't know. i personally don't own an 818pro. but as far as i know, the wm6 rom for 818pro available on the internet were all unofficial. flashing those roms will void warranty.

however, i heard alot of positive remarks for the wm6 over wm5 (faster, better looking interface, "software based - touch-flo" etc)

for more info, u shld check out xda-developers forum!

PS: i personally don't recommend flashing unofficial roms.