how about something like slack.com, it's a mix of forum/chat and messages received while offline are viewable on phone and pc. It works on private invites and even channels inside can work with invites to further limit participants, it's a really powerfully collaboration tool.

I am good with skype and irc for the whale trading group/vip..am fed up of bagholding in general and wanna play properly with the whales..it's easier to become a baby whale in a group and force to be reckoned with than on my own.. ..I got another idea..all of us in whale group if we trade together and make a profit we should make 2 pots..one pot in case one member is left holding a bag and the other pot to donate to to buy assets for backing PLANKTON. say 10% of our winnings in each pot. Just an idea. ..I am nearly @ 15 million now..btw I like fb group very nice.I joined and am liking al the stuff..Can I post my baby whale vid there? .