What it needs is a very simple UI, setup process for mass adoption. It's one of those things that makes people hesitate. Instead they opt for simpler stuff like Hamachi, Tunggle, etc.

I haven't used it in ages, if I'm brutally honest.

looks like a chat icon (someone's head and shoulders in silhouette). is it similar to kopete's? [edit: nope. no idea what it's reminding me of, but sure i've seen something similar]

You can see the big version of this icon on the openvpn site. The OSS image is similar just green without the lock.

oh, i'm an idiot. yes, it's the OSS image. no idea why i think it's associated with chat.