Dave Zatz, Slingbox fan, tested out the Hava location shifter and confirmed our earlier thoughts that it didn't quite measure up to the Slingbox. The Hava does come with WiFi and live stream recording abilities, but its software was limited, there was no Mac support, and it had trouble with streaming over EV-DO.
In addition, the Hava wasn't nearly as customizable as the Slingbox. It has no real favorites, you can't tweak its settings, there's not enough IR codes for your current boxes, and a few other shortcomings that resulted because it's a first generation release. Perhaps after an iteration or two, Hava can pose more of a threat to Sling's location-shifting dominance.
Hands on with HAVA [Zatz not Funny]