GSM Japan

[Rowland Cheshire]

NTT Docomo now provide a GSM service within Japan - 1900Mhz. 
I looked high and low on google and found nothing but conflicting information. 
Anyway I went into a Docomo store today and asked.
Anyone interested will need a contract. The good news is that the Docomo phone 
comes free! and the SIM card is separate. 
Rates are 3400yen/month upward includes 25mins free calls then 36yen/minute. 
Short mail and email around 3yen per message.
Does anyone know of problems using the Docomo SIM card in openmoko. It is an 
expensive exercise to buy and try. Or is it safe to assume that any GSM SIM 
card worldwide will work. It appears to be standard size.