yakky

The router dns table is probably your best bet as mentioned above. Another good alternative is nmap, it'll find the ip and then you can search for the ports on the device. That said, I've been in the same predicament where the camera won't get DHCP for some reason and it defaults to something that isn't on your routers IP range. The only real workaround I've found for that is to hook a laptop and the camera into a single switch and check the arp table, the camera usually shows up that way.

I had a couple of the trendnet IP cameras, they are worthless in the dark unless you go with the IR models, which are much more expensive. Check out Foscams, there is a pretty good following on them and some cool mods you can do like change lenses. Also the Panasonic "Pet Cam" is one heck of a great camera for the price. Its not POE but you can rig it to be.

Google dirb and wfuzz. Both are tools that can hammer away at a webserver and guess URLs by bruteforce. I've combed my Nightowl this way. If you can get an SDK manual from the mfg, that's definitely the way to go. I scrounged one up for my Foscam and it was a huge help.

I'm in the same boat as you, I've got a Nightowl and I'm looking to do the same. Several of the computers I use either don't support the web browser plugins or I don't have admin on them to install it. I think your best bet is to use a proxy server to snoop the traffic or do some packet sniffing.