Great resources for virtual mentors:
Remote presentation software:
www.anymeeting.com
you can share your desktop, schedule conference calls, record sessions, etc. Best part, it's free
Remote computer support:
www.teamviewer.com
Remote control another computer, unattended access to computer (if desired), best part, it's free
Remote communication:
www.skype.com
Call any other skype user for free, call 800 numbers for free, call any phone number for cheap, can share your screen, can do two person video calls for free
Document collaboration: docs.google.com
Share documents, spreadsheets, simple forms. Multiple users can update simultaneously. Best part, it's free