Had a chance to test Roaming and to my surprise, it worked well. Was in Singapore too. However, there seemed to be times during the day when my bold seemed a little too quiet. So decided to change to 2G and voila, it started singing again. Not that noticeable, just in some areas with vast density of peeps, like the F1 track... networks were quite congested at that time.
Other than that, while on 3G or 2G setting, all around Singapore was A OK! Works well. A few hiccups here and there of course, but I guess it's gotta do with SingTel tweaking their cell broadcast with the anticipation of crowds and hoards of peeps roaming in Singapore. Hadn't had a problem with EDGE on Curve. Might want to take another trip down there next month, just to test out the Connectivity again. I'll be going to HK end of October, so, I can test out with PCCW or Hutchison or CSL there. Hope it's a breeze.... :D