What's new in 4.0beta3:

*) added support for 802.11n atheros based wireless cards;
*) added ability to run other OSs in MetaROUTERs;
*) console: Lua scripting language. http://wiki.mikrotik.com/wiki/Lua
*) console: added nstreme-dual OIDs;
*) incorporated all the bugfixes since v3.23;

What's new in 4.0beta2:

*) console: added 'without-paging' argument to 'monitor' commands;
*) console: now 'without-paging' and 'interval' arguments in of 'print'
    commands work together. Printing can be stopped by pressing 'q' or
    ctrl-c, any other key triggers printing;
*) incorporated all the bugfixes since v3.22;
*) fixed TFTP server logging;
*) fixed problem - "/system upgrade" did not show proper package
   architecture and was unable to fetch new packages;

What's new in 4.0beta1:

*) added support for MetaROUTERs;
*) all test packages are regular ones;
*) console - can mix named and unnamed arguments, can use names for unnamed
     argument values. For example all of the following commands are
     accepted now:
       /ping 10.11.12.13 count=4
       /ping address=10.11.12.13 count=4
       /ping count=4 10.11.12.13