hi melwatz,
really nice to hear the positive comments, we're glad you're here. yes, there are some very talented stampers!
there aren't any special instructions or rules, though that would definitely be a good idea. I can think of a few things off the top of my head though:
1) make sure your scanned images or digital photos are saved in jpeg format. the jpeg format provides relatively small file sizes (making for faster uploads) and is generally the best format for photos or scans. for more info on preparing your cards for upload, read
this article.
2) for faster uploads, size your scans/photos down to 640x480 pixels or so before uploading. the software will downsize your image for you if it's larger, but larger images take longer to upload.
3) fill out the upload form as best you can. the more complete your information the easier it is for others to find your work.
4) you are welcome to create and fill your own private albums, but these are generally a little harder for other people to find because your cards don't show up in the 'latest photos' area of the index page.
5) if you don't see a stamp set category for your card, put it in the top level category (like 'A-F', etc.), then we'll add the category for you and move your card.
6) after you upload your card there'll be a brief delay while we approve the upload. this generally takes anywhere from a few minutes to a day or two (much more rarely). you'll get an e-mail notice when your card is viewable.
7) make sure and leave comments when you see someone's card you like! everybody loves to get praise and feedback on their creations.