I like the color scheme. It's great on the eyes and provides a good contrast. I think you have too many shades of blue though. I count 6 and personally I would restrict it to 3. Same with the green links at the problem...That green is more of a dark earthy green as opposed to the light, airy, modern green used elsewhere.
The logo seems to be missing something. It definitely says "seeker" with the magnifying glass, but it doesn't say "icon." I would hazard a guess and say I feel this way when I look at the logo because icons are more of a "web 2.0" thing and the logo doesn't scream that at me.
I searched for "turtle" in your database and did come up with a handful of turtles, but...I also came up with record players and turkeys? I searched for "snake" and some snakes, but also food items?
In FF for Mac I can't seem to download a PNG copy of an icon. I click "Download all size .png files for All System" and I get a box that's the same page I'm already in.
Lastly (and this is sort of off topic of your request), I don't understand the point of these icons. They all say for "personal desktop only" or some other such thing. Why have a website with icons you can't use for anything? Personally the only reason why I would need icons is if they are being put on a website which these you can not.

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