Nyitok a BeOS-nek is egy topikot, mert nincs neki.  🙂
A wiki szerint ( http://en.wikipedia.org/wiki/BeOS ) itt van a timeline, ezek az eddig kijott verzioi:

1996, Jan. BeOS Dr 6 (Developer Release)
1996, April BeOS Dr 7 (Developer Release)
1996, Sept. BeOS Dr 8 (Developer Release)
1997, May BeOS preview Release
1998, March BeOS 3.0 version for x86
1998, April BeOS 3.0 version for PowerPC
1998, June BeOS 3.1,
1998, July BeOS 3.2, improved hardware support (SCSI), about 800 software products available
1998 Nov. BeOS 4.0 read/write support for FAT 16/32, for x86 and PowerPC, optimized performance and better hardware compatibility
1999 BeOS 4.1 integration of the Pentium III instructions SIMD
1999 June BeOS 4.5
2000, March BeOS 5.0, free of charge for private users, needs at least mbyte storage space; support for NTFS, Firewire and PCMCIA
(was) planned BeOS 6.0 with network environment BONE, Office GoBe
2003 Oct. Zeta RC1
2004 Jan. Zeta RC2
2004 June Zeta RC3
2004 Oct. Zeta Neo, SP1 at Dec. 2004
2005 June Zeta 1.0

Itt megemlitenek: http://osnews.com/story.php/17518/Review-Zeta-1.5/ valami keszulo Zeta 1.5-ot, a BeOS uj verziojakent, de a cikk az 2005-os.

Valaki tisztaba rakhatna, hogy mi az a Zeta, es hogy fejlesztik-e meg egyaltalan a BeOS-t. En is kivancsi vagyok ra!  🙂