I have noticed a decline in activity at Peeron. Inventory submissions I sent numerous times through the year last year have still not been put up on the site and there has been no feedback from them either. As a result, I've moved to using Basebrick (http://www.basebrick.com
) in order to keep up with all my part and set purchases, and would highly recommend it to you all. It does what Peeron does, but integrates well with Bricklink, using their inventories and part numbers. Import of loose parts from Peeron and sets from Brickset was also easy and was found to be the most accurate way for me. All in all, the Brickset/Bricklink/Basebrick combination provides enough for me :)
If anyone has an update on the latest state of play at Peeron, I'd be interested to hear from you.