I'm very interested in this as well. I'm surprised there hasn't been more talk about it with the advent of 3G in the tablet devices. I personally use SlingBox but if HAVA ends up porting over to Maemo 5 and the N900 I will definitely be getting a box. Having SlingBox is fantastic, having it on my tablet would be even more so.

Has anyone tried contacting HAVA to ask about compatibility of plans for a new software release? Seems like they tend to cater to the tablet folks so I would assume one is in the works...