We have a plan (one of the many things on our to-do list) to create a group photo account on Flickr where members can share their photos. Or you can just include a link in your post to your own photos on Flickr/Picasa/Photobucket.
Cool–you figured out how to do it. When adding photos to posts you can set the size in the column to the left of the image. A width of 500 seems like a good choice to get a larger photo that doesn't get cropped off on the side…
Oh that picture of the meadow has me feeling a warm spring ride…however me things it's prolly walk a bike through it right now. Come to think about it, it might be fun to ride that loop this week before anymore snow hits.