Thanks for the good word! I always learn when coding.

I was actually surprised how simple Bing API was to implement! Painless! (feel awkward right now giving so much benefit to MS, LOL!)

With the logo, I used Bing-like font with obvious Google colors. But I will put some more thoughts into it. I think main Google logo haven't changed since ever (the only thing they added was a shade).

"Filter in a result site" -- can you shortly elaborate, please??

Thanks for your input!