Hi,

We are pleased to announce the release of Ruby 2.1.0-preview1.
Please check out the new features in Ruby 2.1 before final release!

* http://ftp.ruby-lang.org/pub/ruby/2.1/ruby-2.1.0-preview1.tar.bz2
SIZE: 11475553 bytes
MD5: d32d1ea23988399afadbd21c5a7a37fc
SHA256: 860b90d28b214393fd9d77ac2ad65b384d8249cd59b658c668cf0c7bad1db341

* http://ftp.ruby-lang.org/pub/ruby/2.1/ruby-2.1.0-preview1.tar.gz
SIZE: 14449544 bytes
MD5: 9df4f546f6b961895ba58a8afdf857da
SHA256: 747472fb33bcc529f1000e5320605a7e166a095d3805520b989e73b33c05b046

* http://ftp.ruby-lang.org/pub/ruby/2.1/ruby-2.1.0-preview1.zip
SIZE: 16124069 bytes
MD5: f9bc3f9a10174a022381ce2c60a59e64
SHA256: 28855621f7d364277e7f258d5cc380e005896ef8ebc36e5cbf78d2bf763c291b

The notable changes are:
* VM (method cache)
* RGenGC
* refinements
* syntax
* Decimal Literal
* Frozen String Literal
* def's return value
* Bignum
* 128bit
* GMP
* String#scrub
* Socket.getifaddrs
* new Rubygem

Known issues is:
http://bugs.ruby-lang.org/projects/ruby-trunk/issues?query_id=102

See also following ths schedule and other information:
http://bugs.ruby-lang.org/projects/ruby-trunk/wiki/ReleaseEngineering210

thanks!

-- 
NARUSE, Yui <naruse / airemix.jp>