I wonder if someone knows of a solution (or is willing to develop one for money) for a Hotspot captive portal including options for Facebook login, email login, splash pages etc.
Looked through the topics but there seems to be just bits and pieces here and there. thanks in advance.

anyone alive on this forum?

Theres loads of ready to run solutions on the Made for Mikrotik page :

http://www.mikrotik.com/mfm?mfm_category=3