A moderator feature lets you grant access to guest speakers. And business users will appreciate the business-card feature, which lets them easily exchange contact information. OnLiveCommunity Server features aunique technologythat lets multiple users converse simultaneouslyusing their voicesinstead of the keyboard. Traveler, like Black Sun, lets users share a 3-D environment. But OnLive's avatars communicate with their voices, not text.
Talker uses the same multivoice technology, with a straightforward, non-VRML interface.
Overall, OnLive's technology is the most compelling. The Palace is more primitive, but it's inexpensive, easy to build, and consumes little bandwidth. Visually stunning chat and collaboration on the Web. Shared real-speech communication. An inexpensive, low-bandwidth way to build an online meeting space.