You may have already considered it, but if you haven't, I have had a lot of success tethering to my cell phone.
If you have a smart phone, there's a lot of free apps that can enable tethering without a monthly charge. I use a Droid Razr and the app PdaNet. Latency is, at most, 70-80 ms, though crappy network coverage happens from time to time.
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Xasten <The Mystical Order>
Frieza <Stasis> 1999-2003 Prexus
"I am the way, the truth, and the life: no man cometh unto the Father, but by me." JOHN 14:6
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