New functionality has been added to the forums for Community Supporters: Upload space!
The space allotment is tiered according to your CS level, which are as follows:
CS members will be allowed (in your "post" screens) to upload photos for use in threads in the Water Cooler and elsewhere. Of course, these amounts are subject to change (they won't go lower, only higher), but I wanted to see how these numbers would work out to start.
You also have, under "My Controls", have a summary of files you've uploaded to the server here so you can keep track of them.
Regular member accounts have a limited space of 500k.