OK, here's some feedback on the Parrot CK3000 Bluetooth carkit.
The system is fairly awesome. It consists of a microphone, a box of tricks that does all the work, a speaker, and a small (2 cm wide by 1 cm high) two-button switchbox with a "dial" and a "hangup" button.
It works pretty much seamlessly with the Ericsson T68i. First thing to do is set up the "in-car" profile on the T68i with specific words for "activate phone", "home", "work", "mobile", and "end call".
Then pair the phone with the carkit, which was dead easy and outlined in great detail in the instruction manual.
Then set up voice commands for all the numbers you want to be able to dial or recognise as incoming calls. The advantage of the Ericsson is that you can have up to 100 of these I think, as opposed to a much lower number on the Nokia.
Finally configure the "in car" profile on the phone to use Voice Assisted commands.
The way it works on a day to day basis is:
Get into the car, and switch your phone to "in car" and "Bluetooth on" (assuming it's not always on).
Turn on the engine of the car. After 10 seconds or so, the speaker beeps to indicate it's paired with your phone, and the phone list in the car synchronises with the list on the phone.
To dial, you say the word that you've associated with the "activate phone" setting (in my case "voldemort" :) ). The radio then turns off, and the speaker beeps to say that it's heard you. You then say the name of the person you want to call, which causes the car to repeat the name if it's understood it, or say "name not recorded" if it hasn't, and then beep again.
If there's only one number stored in the phone for the contact, it then dials the number. If there is more than one, you say "work", "home" or "mobile" to choose the relevant number associated with that contact in your phonebook (another advantage of the Ericsson is the ability to store multiple numbers against each phonebook entry).
The car then repeats the number type you've chosen. and dials the number.
At the end of the call, you just say the phrase that you've associated with the "end call" function.
The two-button keypad in my LS430 has been mounted just in front of the main central armrest (photo to come soon), and acts as an alternative to the "activate phone" and "end call" voice commands where needed. I've only once needed to use the "activate call" button, which was when my radio was so loud that I couldn't hear myself speak, so the phone system had no chance!
I've used the "hang up" button a few times, when for example I've been leaving an answerphone message for someone, and don't want the message to finish with me saying "terminate call". :)
The sound quality from the speaker is good and clear, if ever so slightly muffled. On the LS430 it can't be put through the sound system for some reason, although on other models it can apparently. Similarly the quality as heard by the person you're calling is perfectly clear.
On an incoming call, the radio turns off automatically, and if you've recorded a name associated with the incoming number, the speakerphone says that name. If not, it just rings. You can then say "end call" to move the call to answerphone, or say nothing for the call to be answered automatically.
Finally, an initial concern of mine about the phone itself not being charged, which it would be under normal circumstances in one of those nasty phone brackets, has been sorted by mounting a charging bracket in the main armrest compartment, using the power socket that is in that compartment.
To sum up, I'm dead chuffed with the system, and would recommend it to anyone. How it works in noisier cars than the LS430, I don't know, but I wouldn't think that this would be a problem. It's certainly the safest model I've used, with no handset in sight to distract.
The install cost me £420, though I'm sure this can be done more cheaply. I'm very pleased with the way that it integrates with the car though, so don't regret having spent this amount of money.
Hopefully I'll make it to a meet sooner or later so that anyone interested can have a play with it.
If you have any questions, post them here and I'll try and answer them asap. A review of the LS430 as well as some photos will be up on the site some time in the next two weeks after my holiday in Scotland (cue photos of car against barren highland wilderness :) ).
Paul