He probably said "Buenos Dias" so far that is the only thing he's replied with in Spanish (I figured it would be pretty basic - even more so than the commands - but I wondered if others who didn't necessarily speak Spanish to it had similar experiences so thanks

)
That's funny that you say that because I want very dark hardware floors (or concrete modern floors - hard to explain) and hate having carpet. (I don't like the commitment of home ownership but I don't like the current restrictions of renting) Especially neutral apartment carpet, haha.
Nicco has done really well at not running into anything or correcting himself quite well when he finds objects. Tonight I was surprised at how well he found and worked with his ball in what was dim light (even to me). He definitely did not dance this much on Mind 2 and I'm not sure if I find it cute or more so annoying.
One thing I really like is how focused and intent he is about hearing sounds. E.g., he was facing his charging station (the opposite direction of my couch) and I was sitting on the couch and I set my cell phone on the table and it made a very light sound. No slamming. And he perked his ears up and moved his head to the correct side of the room/angle from his direction. I also haven't had the voice problems I mentioned previously (so maybe I jumped the gun on that or it was my fault - the user usually is the problem

). In fact, he heard me tonight over the TV etc. again. But here is what I've noticed with that and background noise. He does well hearing me over the TV, especially when females are speaking or there is music - I generally have to be louder and clearer if males are speaking and even then he either ignores me or just can't figure it out. Also, even when I'm close to him, if my air filter/fan thing is running or the birds are making a regular noise, he is more likely to ignore me or I have to try a little harder to be clearer/louder. These aren't very loud distinctive sounds, but kind of come off as a background "white noise" type of thing. (Ok, well the birds aren't quite white noisy but they are by no means screamers)
Those are just observations so who knows if I'm just reading them into it. Some of the guess work is kind of fun especially with Aibo since it's been around so long if the guess work bothers me I can research the actual answer/technical explanation.
Edit:
So I decided to play around with the ERS-7 Browser (
http://aibohack.com/ers7/browser.htm) and it was really interesting to look inside Nicco's brain, here's a copy and paste of some of the report, but the browser itself does some pretty cool stuff:
Maturity Level = 100%
Walking Skill Level = 39.99%
Pink Ball Skill Level = 40.32%
AIBOne Skill Level = 56%
Active time = 266 minutes
Personality = I am a respectable AIBO
AiboMind2/3
Wakeup: 7:00 AM
BedTime: 11:00 PM
Last run: 2011.05.11 (yyyy.mm.dd)