A friend at one point mentioned that he had a lot of material waiting for when he finally got a scanner. When his scanner aquisition finally came around, I wrote him this. You may find some of it usefull if ever you decide to post material and so I include it here.
If you like the idea of forming a network of Net friends with similar interests (which I recommend as very rewarding), then I would suggest making a few posts every week as opposed to one giant flood just once.
Posting a half dozen things a week will get you serious attention and the fact that you can keep it up will _really_ get peoples attention. It will also allow you time to properly think through what you are posting and how you are posting it. If I may make a few suggestions...
Write a little paragraph as introduction for each piece of art. Write a different one for each piece. This personalizes your work and drives home the fact that you are producing this material, not just recirculating it. This may sound like shallow egotism but it is not. The currency on the net is respect. The people who get noticed and communicated with and sent things, etc., are those who produce content. The vast majority of the readers of these newsgroups just download stuff and very occasionally share things between themselves that they have downloaded from the net. They for the most part live in isolation. In contrast, I get a dozen Emails a day from people of similar persuation, often containing interesting tidbits you never see in the newsgroups. I correspond regularly with a number of women who have snuff fantasies, where they are the ones snuffed! It is the producers of content that have this kind of fun. Believe me, you want to get noticed as a producer.
Be careful of the formats you use with your material. You want to use a 16 color GIF format for black and white pictures (or even two colors in some instances). Use JPG for color pictures. Crop and size your pictures appropriately. A 1000 x 800 color JPG is a big file. Someone with a slow modem will wait quite a while for it to download, do them the favor of not making them this big unless the detail of the picture requires it. Do your cropping and resizing immediately after scanning while your pictures are still in bitmap format. If you REsave a JPG it will lose resolution each time. If you want to do work on it in the future, keep a copy of it in bitmap form and work only on the bitmap until it is finished.
Cropping is important! I would estimate that thus far in all of my downloading, fully one third of the download time has been a total waste. This is because I am downloading the digital information necessary to reconstruct the totally irrelevant details of the border and scanner lid and whatever other 'garbage' was left in the picture. I like to clean up my pictures as much as possible, crop them as much as possible to include only the most relevant details, then resize them to the degree that suits the image. You've put a lot of work into creating this material, this last stage takes little time but makes a huge difference. Now is not the time to get sloppy.
Finally, sign your work! Put together a little signature, if you've not already done so, and include it in each piece of art you post. Your work will likely see a lot of circulation and you will virtually never be credited as the author. Let your work do the job of pointing at you.