http://zumastor.org/man/ddsnap.8.html a way to ‘sync’ block devices in ‘rsync’ style. Useful to implement backup of xen VMs based on LVM volumes. Also see http://serverfault.com/questions/27397/sync-lvm-snapshots-to-backup-server
http://laforge.gnumonks.org/weblog/2010/04/14/#20100414-anatomy_of_gsm_cellphone An excellent [attempt of ] description of the GSM cell phones hardware, design, architecture and implementation
http://www.ietf.org/proceedings/10mar/slides/tsvarea-1.pdf “secret of ChatRoulette”. Describes details of RTMFP protocol, that Flash Player (from v.10.1 and above ) uses for media delivery. Protocol is closed/proprietary, encrypted, UDP-based, uses “forward” servers to establish direct session between the nodes. It is not clear if C&C; structure is distributed.
http://www.opennet.ru/openforum/vsluhforumID3/65661.html#23 Notes (exert) from Joanna Rutkowska recent paper comparing KVN and XEN architectures from security and design standpoint
http://www.alavrentyev.com/gallery_spb.html creative pictures of Spb, B/W
http://www.robtex.com/ websites that provides a lot of useful info, like RBL (Relay Black Lists ), DNS, AS, BGP, etc
http://lwn.net/Articles/377391/ Article covers SCALE8x presentation from Ronald Minnich /Scandia Nat. Labs/ about issues involved running large scale networks [ >10M nodes ] . Article contains a lot of useful links, recommended reading.
http://bigbluebutton.org/content/videos opensource web-conferencing software, something like GoToMeeting, allows sharing voice, video, presentation and desktop
http://www.argentuminvoice.com/ open source client-management and invoicing software
http://engineering.twitter.com/ all sorts of system and software engineering info from Twitter. Also see http://twitter.com/about/opensource