Or on some hardware more like a traditional home router, e.g. a PC Engines Alix, or Soekris. Either will give you a very powerful router that runs on only a few watts. The downside of these is they're (AFAIK) 100Mb only, and it's hard to find a suitable wireless-n card. I've found pfSense to be much more powerful and stable than DD-WRT. pfSense 2.0 onwards will let you set any DHCP Number, Type, Value combination you want.

Have you seen the Bulldozer reviews? They've been hitting AMD over the head due to its poor single-thread performance (amongst other things...)

No, it's (mostly) Adobe only, using Flash for streaming (via RTMP) and AIR for downloaded programmes. The iPhone version uses HTTP streams. get_iplayer is a nice script to download iplayer content a little more permanently.