--Independent Meetup, not related to the IOTA foundation--
IOTA is a promising protocol / digital currency, specially designed for the Internet of Things (IoT) and Machine Economy.
Who is the MeetUp for?
Everyone interested in cryptocurrencies, IoT, Machine Economy and the IOTA protocol. Mainly we would like to bring together developers, entrepreneurs and corporations in order to explore new use cases for the IOTA protocol and to form new StartUp companies.
The special thing about this coin is the architecture, which ISN'T based on Blockchain, but build on a Directed Acyclic Graph (DAG) - The Tangle.
Differences vs Blockchain:
IOTA has no mining and no blocks
IOTA has no transaction fees
IOTA scales almost infinitely, unlike Blockchains
Read up two very well written introductions here: