Image tile HTTP requests

Compression
Wouldn't it be more natural to have the web server set content encoding on it's responses and have World Wind read those using HttpWebResponse.ContentEncoding (and decompress when needed)?

Conditional Gets and 403 Not Modified
For our dynamic layers.

Example: HTTP GET If-Modified-Since: Sat, 29 Oct 1994 19:43:31 GMT

If the file was modifed since DATE, server will send the file. If not, server will send a 403 Not Modified. WW can and needs to implement this in several areas (WMS server lists?, Modis?) Plus for our "dynamic" layers.