Over at the Dark Age of Camelot Herald there's a brand new (and very extensive, not to mention interesting) Ghost Keep Guide.
The premise is simple. The realms race to complete ‘Supply’ quests that will allow the ‘Ancient’ NPCs enough power to begin a summoning process that will bring forth the spectral essence of a former Keep Lord for each realm (Lord Berkstead the First for Albion, Jarl Nottmoor for Midgard, and Chieftess Crimthainn for Hibernia.) Unless noted otherwise, the quests described below are available for levels 45-50.
Check out the guide here.