Yup, it's been released, with the full point release weighing 267MB / 274MB respectively (for Windows / Linux respectively), and the patch point release (that updates v1.3 to 1.4.2) weighing 66.1MB / 72.9MB respectively. Here's a select slice from the changelog, from the readme:
Fixes & Updates in 1.4:
1.4.2 Point Release :
* player lean, player models lean in the direction of movement use g_playerLean to scale or disable the effect (client side) * fix wallhugging on ramps fix also makes ramps slightly faster * horizontal speed fully maintained when crouch sliding and hitting a ramp previous version had a little dip 1.4.1 had a bug that caused a sharp speed drop (this is also fixed) * RG ammo box 10->7 * si_fps limited to 90fps for q4mp/, now declared in gamecode so mods can change their max * predict weapon changes for the local client. more responsive on high ping (can be turned off with net_clientPredictWeaponSwitch 0) * revert the projectile code to 1.4.0, not trying to predict projectiles anymore the prediction code of 1.4.1 can be enabled with g_predictProjectiles 1 (client side) (was causing too many bad artifacts) * reworked the hit sounds / hit feedback propagation. fixed skipping problems * change network demo extension to include the protocol number for Quake 4 1.4.2, the extension is .ndmo85 * fix network demos not setting the si_fps value properly * fix client prediction being irregular when connected to a TV repeater * added r_skipSky for a cheap black sky * fix a crash in single player (sound related) * fix several SMP-related crashes * fix a crash in autodownload server * hud_showSpeed cvar (shows current horizontal speed) * hud_showInput cvar (shows the input state to learn how to make particular moves) * hud_InputPosition, alters where the showInput feedback is displayed * hud_InputColor, alters the highlight color of the showInput feedback * s_useOcclusion no longer cheat protected (can be changed by network clients now) * no gauntlet spinup time, damage is immediate now * bse_rateLimit defaults to 3, showing all shotgun pellet impacts * added g_nailTrail, g_grenadeTrail, g_rocketTrail, g_railTrail, g_napalmTrail to disable weapon trails * updated reference netdemo included for performance tests: id_perftest.ndmo85