I started to use Flickr to upload my images, so I want to introduce about this site.

Flickr seems to be generally a site for the photograph opening to the public, but it can also upload some graphics on it. And when you upload images to Flickr, you can also apply License to your images. (There are six of Creative Commons License.)
I think Flickr is a good place to arrange and distribute the image on the network.

Making account is free but when you create account, you also need Yahoo! account.

http://www.flickr.com/

Look like others siteX| where my friends invite me to enter and share photos

Like most people, I use Photobucket to store my images. It works well but lately I've felt myself more restricted due to the filesize and resolution limitations.

Does Flickr over an advantage over Photobucket in this aspect? and does it allow direct linking?

i have my own way, i just email some of my pics in my own email....so i can save it there....

Currently, I use Filelodge, but the Pictures are not always available, don't know why! Maybe their service is a little crappy! You can see how sometimes my Signature Isn't Available, so I guess I'll try the ones that are mentioned on this thread!