I've found that you can attach bitmaps, jpegs and gifs
All as long as they are not larger than 60 K
Bitmaps do not show up as pictures, but as links
This picture is inserted from my web space, I just used the little mountain and sun icon, it is the first button on the second line when you add or edit a post.
Past the address into the window that pop up.
If you want a big version availabe, then click on the link tab in the little pop up window and past the urn of you big picture there.
Click in this picture to see the 10 megapixle version.
The following are attachments. they were added by clicking the browse butttons and pointing to files on my hard drive. I chose a bmp, gif and jpg, and made sure they were less than 60K. This is only convenient for those who either have no first class web space, no other web space or just don't want to take the time to upload their file to a web space. It is great for those who do not have a 1st class membership.