I've created a site, NMCWatch.com, which displays technical charts and market data for Namecoin exchanges, in order to facilitate Namecoin trading. Market data is stored periodically from the exchange APIs and retrieved locally, allowing historical charting to complement live ticker displays. Bitparking.com exchange is currently supported. The site can be found here:http://nmcwatch.com
-- 5 minute/1 hour/1 day Open/High/Low/Close candlestick/volume charts for Bitparking.com exchange (BPX)
-- Market depth chart for BPX
-- Ticker for BPX
-- Price lines/moving averages
-- Support for BTCex.com (BTCEX) NMC/BTC and BTCEX NMC/USD
-- Namecoin network data/fundamentals
My thanks to doublec of bitparking and the other exchange owners who publish their APIs, without which this project would not be feasible.
Let me know if there are other features you'd be interested in seeing, and I can look at adding them.