About the web page. These is a list of things which IMHO need to be changed:
1) the logo isn't the original one, though the original one was itself not very good; but this seems to me definitely worse (looks banal). I'd prefer a different logo or keep the old one.
2) Colours scheme is dark, gloomy, and readability is bad.
3) There are no images, to understand what the site is about you have to read what's written: and still you won't find on the main page the words "artificial life" or anything else explaining what the program is about.
4) The whole page is included in a vertical band, which is smaller than 800 pixels wide on a 800 px screen. This is surely an error, probably you intended it to be 800 px wide on a 1024 wide screen.
For Numsgil, about the organisms sharing: are you sure you can't set up a (confined) ftp space on the darwinbots server? It would be really cool (shouldn't affect traffic very much, organism files are tiny).