This is a list of the websites of professionals who have contributed to Steph's character. They are a great source of news and background information about Steph!
This one, Lee Garbett's blog, is the most relevant. It contained continuing updates and artistic sneak peaks on Stephanie's development in the Batgirl series. A great resource!
Now that Dustin Nguyen is the new artist on the series, check out his site!
And his Deviantart!
Here are some other professionals who contributed greatly to the legend of Stephanie Brown:
Steph's creator, Chuck Dixon' website: The Dixonverse
Pete Woods, an artist who had a really long run on the Robin title and was very important to Steph's development: The Art of Pete Woods
And of course, these websites contain regular updates on the goings on in the DC universe, including lots of updates on Steph's adventures:
Here are the twitters of relevant creators: