I find that Photobucket is really awesome for attaching photos in posts. But really, if your photo is online *anywhere*, all you have to do is find the link to the photo, then when you're writing your post click the icon that is the framed picture of a tree (?) and you'll be prompted to enter the link. To find the link to a photo online, usually just a right click and "copy image location" does it. Sometimes I right click and "open image in another tab" just so I can see the image by itself, and what size it really is. (Sometimes when you see a picture on a website, it's sized for that particular page. The image itself could be a different size.)

What I like about uploading photos to photobucket is that if you hover over any of your pictures, you just click on the appropriate code you want (link to a full-size picture, link to a thumbnail --which is what I do -- that is clickable so people can visit the full image on your photobucket site if they care to see it larger...) Also, the photobucket app for the edge is awesome. I like it much better than the Picasa app, which is where I've always stored my photos in the past.