I didn't know about the GUI Competition for Tor - a good tool for securing the privacy of internet users. I've been using Tor for a while now - and at one point I even ran a Tor router - but the use, especially with dynamic network connections, is still a bit clunky for regular end users. Of course, I also hold the opinion that end users should learn more about their computer and therefore the installation and use of Tor should also be feasible for these people - but if we really want Tor to be a sign against state data espionage, then we definitely need graphical interfaces for activation, use, and configuration. Only then will regular users also think about whether they should use it after all.
For this reason, I am also particularly pleased that the competition has now moved into the next phase - the actual programming of the GUIs. And as a stupid Mac mouse pusher, I of course also wish for an OS X interface for this.
By the way, there is a very practical - and in my opinion obvious - application of Tor: public WLAN hotspots. Communication usually takes place unencrypted on them. This makes all accesses directly visible to others - unusable for accessing sites for which you have a password, if these do not also offer SSL immediately. And particularly problematic with all the other unencrypted services with which one likes to play around on the Internet - IRC for example (a private chat is not all that private if you conduct it over a public WLAN hotspot ...). Tor can help here very easily - a local Tor installation on the computer and the client software configured accordingly and you already have a kind of super-VPN.
This is also a reason why I wish for a Tor port to the small Nokia 770 tablet.
I myself do not use Tor for all services - but I generally have a network configuration ready on the Mac, in which Tor and Privoxy are activated by selection (I would like to be able to toggle the socks-forward in Privoxy via a Privoxy-GUI - then I could keep the Privoxy environment generally active and only switch on Tor when needed). This way I can quickly and easily switch on Tor on the go. For Jabber I use Psi, for which I have the Tor service generally activated. For IRC I use XChat-Aqua, which can be easily equipped with various server configurations, so that I can activate or deactivate Tor (many IRC networks do not allow IRC use via Tor).
In my opinion, a GUI on the Mac should integrate into the network environments on the Mac, so that it makes corresponding changes when activated, just as the environment switch does. And you should be able to easily slip new configs under other programs, as was the case with the old Mac Locations, for programs for which the proxy must be entered manually.