There have been a couple of videos posted on YouTube, one 2 days ago (27/2) showing an iPhone with a custom loading screen. This must be from a custom firmware image:
http://www.youtube.com/watch?v=7mYSGbm02zQ
And the other released today (29/2), and MORE EXCITING, more obvious (as I imagine many won't understand what the first one means), shows an iPhone upgraded via iTunes from 1.1.1 to 1.1.4 and remaining unlocked and jailbroken!:
http://www.youtube.com/watch?v=ks86VRzVLic
Keep a very close eye on these guys... I think we'll see something very exciting from them soon... in fact - I believe this will probably be released on the 6th of March immediately after the SDK.
The Dev Team were to release the JerrySIM (that Zibri stole) using this same approach... release teaser videos first without releasing the software:
The following release scenario is suggested
T0 : jerrySIM announcement and video proof, no release
T0+TS : release of jerrySIM as an obfuscated (free registration needed with
phone IMEI/serial on a server) TurboSIM application
T0+SC : release of jerrySIM as a Silvercard code (preferred)
T0+FC : release of jerrySIM as a Funcard code (optional)
TS timeframe : T0 + a few days
SC/FC timeframe : TS + 1 week max
