Disclaimer: I am reviewing my own products in this post. They're cool relatively inexpensive products though so I forgive myself :)
The Pandorabot from Restless Studio is not your typical chat bot. Yes, it chats with you in local chat using an artificial intelligence programmed at pandorabots.com in the AIML programming dialect. However, the Pandorabot will also query Wikipedia for appropriate responses, check your spelling, send email, greet new arrivals, and deliver a notecard, landmark, and user guide. All for L$245 and consisting of only a single prim (the perched 3D sculpted parrot Pandorabot is 12 prims). If you don't have a place to rez objects there is a wearable 3D sculpted parrot Pandorabot (11 prims).
For an additional L$150 the Pandorabot can be integrated into an Actorbot to create a realistic 3D animated avatar bot that includes all the Pandorabot features as well as the programmability of the Actorbot from Sine Wave. The Pandorabot Actorbot Add-On kit consists of a Pandorabot V4, an Actorbot integration script, and a script that can be used to position your Actorbot on a prim and animate it according to what is in that prim. Watch a demonstration Pandorabot Actorbot in this short YouTube video and visit the Restless Studio demonstration Pandorabot Actorbot.
Both the Pandorabot and Actorbot Add-On come with extensive documentation available in PDF online and plain text inworld. Here's a few photos to give you a sense of the Pandorabot look:
Second Life Marketplace (search for "Pandorabot Missy Restless" or just "Pandorabot"). The Pandorabot Actorbot Add-On is also available on the Second Life Marketplace (search for "Pandorabot Actorbot").
The PDF documentation for the Pandorabot and Actorbot Add-On is available online at http://www.scribd.com/missyrestless . There is also a Pandorabots Blog with lots of How-To's, many more pics, and updated info/links.