I have a meeting with a DSN tomorrow (Diabetes Specialist Nurse). A few months back they offered me a trial of the Accu-Chek Expert handset, and while that didn't quite work out, they do now have a few from the manufacturer that they are able to let people have.
From what I've been told the Expert is essentially the same as the 'brain' of the Roche insulin pumps. More than just a BG meter it allows you to input your carbs, level of activity and insulin ratios and will offer a suggested insulin dose based on the information you provide, plus an allowance for level of activity, stress etc.
It all sounds very promising and I'll be interested to see how fiddly it is to use in practice.
For the last 5 months or so I've been logging all of this information in the excellent DiabetesDiary for iPod/iPhone. It has really helped me spot patterns and thanks to its incredibly easy data entry and some nifty data views (monthly and 7 day graphs, monthly average and 7 day average graphs, min max and mean for any time of day flag etc) the Expert handset now has quite a lot to live up to in terms of usabillity and ease of use.
I'll let you know how I'm getting on when I've had a few days to play with it.
Update: Accu-Chek Expert Review - one month in