Any experience with MetroPCS or Cricket Wireless or other similar carrier? I was enticed to try Cricket in another thread of mine but now i'm a bit wary since it clearly reads on their website data speed is limited to 8Mbps. Does anyone know if MetroPCS limits their data speed too? And does anyone know at what point they start to throttle their data? Any other info and insight regarding (anything really) the above, tethering, and just overall experience would be much appreciated.