Hi.
For those of you wondering what the best logo sources are - for editing then posting in transparent form..

They are (best to worst):
1. Wikipedia!
2. The Website itself
3. Google Images

Wikipedia is the best because it usually has:
1. Scalable Vector Logos (.svg)
2. Copyright-free images.
3. Highest Quality Logos

For example, if you visit the NewEgg Wikipedia Page: Link
Then click the newegg logo, then right click > view image.
You will notice it is really high quality, and already transparent =]