I know this isn't particularly leet or amazing, or new, but I just wanted to say that Tomato router firmware is freaking great... so many handy features like IP assignment within DHCP, bandwidth tracking, and more. Plus it is much snappier and more responsive than the stock OS. I would never want to use the stock firmware again.
I had to install it on my WRT-54G to get my Slingbox to work, but I had no idea what an upgrade it is. Reminds me of the time I got new rims, but I ended up being more excited about the smooth ride of the tires that came with them, hah.
Do yourself a favor and install this firmware (if your router is compatible, of course).