Thanks to fact that it had been prominently featured on Apple's Third-party Downloads site, the TiffanyScreens Presentation Broadcasting / Screen-Sharing tool has been downloaded about 40,000 times over the last few months. The feedback was mostly very positive, some of which can be found here, and came surprisingly over-proportionally from users located in Australia and New Zealand.
Since the first beta release of the software was made available in May 2006, TiffanyScreens has been constantly updated and features like watching in full-screen mode, working over restricted VPNs, or password protecting a screen casts have been added.

Work on the most recent update, to what is now dubbed TiffanyScreens 2.5, focused mainly on performance. Updated libraries and a new, optimized runtime library resulted in a performance increase that is most noticeable on the Windows version. A frequently requested feature, adding the presenter's mouse-pointer to the screen-cast, was also finally implemented and honestly wasn't as trivial as it sounds, considering that low level screen-capture routines don't include a mouse pointer or even the pointer-location.

If you haven't looked at TiffanyScreens lately, check it out, it's available for Windows and Mac OS X. Share your next presentation with your peergroup on their Laptop's screens.