wget -q http://static.natalian.org/2009-01-02/2008-tmobile-data.txt -O /dev/stdout | awk -F, '{sum += $5 } END { print sprintf("%.2f",sum) }'
10.89

11GBP for 5 days in Germany? I didn't use data nearly as much as I would in the UK. Android has no data accountancy functionality.

A mobile phone that would detail accurate data roaming costs. Those are the sensible sorts applications that provide tremendous value. Not stupid bar code scanner applications.