I have a tachyon.net system. 600ms is typical with a good aim. Higher latitudes are more error prone. They don't do tcp/ip over the up/down link. They effectively terminate the tcp/ip session on the local lan (answering handshake and acks), encapsulate, and proxy for you on the other end. It makes a BIG difference in overall performance for typical things like surfing and mail delivery. Doesn't help much for interactive work. Type ahead at 600ms is much better than 2x that. vi is usable. Our unit is available for demos and events. DirecPC (Hughes) now has a business grade service called DirecWay. Haven't tried it. One would expect it would be better than the ones intended for residential only. It claims to go to 1.5M down like Tachyon. Barb Dijker NeTrack