I have a lvl 60 Alliance on a classic era pve server, I quit when tbc came in as the server ended up dead. Are there any classic servers left with an active alliance side? And if I transfer to a new server can I go from pve to pvp or classic to SOM?
Classic Era EU English servers are combvined into 5 clusters. Here ranked from most to least populated:
1 - PvP servers cluster: Ashbringer, Bloodfang, Dragonfang, Earthshaker, Gandling, Golemagg, Mograine, Noggenfogger, Skullflame, and Firemaw - inhabited
2 - all 3 PvE servers - inhabited
3 - PvP cluster: with Dreadmist, Flamelash, Judgement, Razorgore, Shazzrah, Stonespine, Ten Storms, and Gehennas - quite empty
4 - RP-PvE Hydraxian Waterlords - quite empty (but the HC community is playing here)
5 - RP-PvP Zandalari Tribe - Dead.
Btw, the link Tengil posted is beyond informative. Is an effort by all of us to make clear the state of things and the viability of our community. There you should find most of the info you need!