I search around the internet every day for the best deal on either model of the Revo and here are the best deals out there currently:
AR1600 (1GB RAM + Windows XP + ION LE):
At Amazon.com for $199.99 + FREE shipping
AR3610 (2GB RAM + Windows 7 + Wifi + ION):
At Newegg.com for $329.99 + $6.99 shipping
Thanks to our read Joel who has found a Refurbished AR1600 at TigerDirect/CircuitCity for $189.99 + FREE shipping.
If I find better deals I will post them.