Few screenies basically using on my home NW of 4 nodes one dog's body file/app server, and 3 clients 2 being wireless.
Most of the other features that are available I have not posted are either same as what you get with the standard linksys firmware though in some cases its expanded like say port forwarding, redirecting etc. The other features I have not posted is screenies that show internal/ext NW info that I would not like to display due to my imagined paranoia and false sense of security

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The command console feature if available on standard would solve similar problems to what cr8or was seeing with it slowing down using a NVRAM reset through the command console. Have not looked into these commands other than the RAM reset/flush one.
Have done the usual portforwarding, redirection, and thibors uPnP fautures is better than linksys FW
Also I have messed a bit with transmiting power as my flat is pretty small and I wished to reduce its range being picked up by neighbours (no SSID broadcast), also get a nice quality signal and reduce laptop battery usuage so played around with wireless beacon interval, DTIM, Fragmentation. Geeks on call released a "Geeks On Call Wireless Networking 5 Minute Fixes Dec 2005" which is dated but hey its handy quick reference guides and the screenies and equipement used is all linksys so was pretty familar for the average joe. I just DLed it from somewere
In my case it is overkill for my home NW but its nice to learn and play. And there are some nice features but its just getting time to sit down and tweaking them all. Or even better ... comparing the 2 FW version - openWRT and hyperwt 2.1 + thibor 1.5 - pro's and con's plus benchmarking. Am sure there's gotta be some website/blog out there with this info on it.
Anyways screenies attached theres not alot but hey try it if you get the time try it and do some benchmarking before and after. I have nothing but good things to say bout this ...