My tweeting aquarium has had a major upgrade: now on the new Arduino Mega (more memory), push-buttons replaced by PIR sensors, webserver in addition to the original tweeter. I am using it to monitor my aquarium with my mobile phone, but it works with desktop browser, too. And it continues tweeting, once a day.
Browse to http://tweetaquarium.mypets.ws to see it in action, the page is served from my Arduino. Push the Like button if you like the page 
-Juissi
Great project - I love the way you've integrated all the different technologies into your site - the fishes sense of humour made me smile
arduinomstr
I'm glad my dog hasn't got a server like that, I'd be a lousy philosopher in her company 
Great Job "human"
Good idea: "Doggy Server". The biggest challenge would be to get electricity to the Arduino (Mini)...
In my project, the next step would be to add more interactivity. How to implement a sensor that senses a fish poking it or swimming nearby? Ideas?
-Juissi
Juissi:
Good idea: "Doggy Server". The biggest challenge would be to get electricity to the Arduino (Mini)...In my project, the next step would be to add more interactivity. How to implement a sensor that senses a fish poking it or swimming nearby? Ideas?
-Juissi
maybe an antenna connected to a switch or sensor
Juissi:
In my project, the next step would be to add more interactivity. How to implement a sensor that senses a fish poking it or swimming nearby? Ideas?
A beam of light shining on sensors triggered when the fish swims in front of 'm ?
Preferably on a wavelength/colour the fish can't see not to disturb day/night.
A camera with movement-detection would be nice, but I guess finding one with such low resolution that arduino can handle it will be difficult.
A piece of wire, attached to the ground, pulley on top, that lifts a very small metal weight resting on a metal plate ? Weight/plate could be used as switch when the wire's poked hard enough.
A similar idea would be a touch-probe which is often used in CNC-applications.http://www.indoor.flyer.co.uk/probe.htm
You should of course change it in such way you could use it in the bowl, but maybe it works...
Don't tell 'm I also said RFID, I wouldn't like to read the comments if they find out my IP-address.