I have an N800 but I use it for a MP3/Video toy. I also have an Nokia E61i phone I use with the N800 to have Internet anywhere. It's a nice toy but hacking from such a small device would prove to strain your eyes. Anyway I would highly recomend the N800 over the N810 since the N800 can support Two full size SD cards up 16Gig in size each. It's like a 32gig touch screen tablet but a lot smaller. I also use it as a VoIP Cell phone to call all over the world. Anyway it's nice but it is also a little slow so do not expect a 2Ghz PC.
I got the N800 after looking at spending $250 or less on a toy and I decided on the N800 over the EEEPC.
CISSP, CCSE, CCNA, CCAI, Network+, Security+, JNCIA, & MCP