It appears that DClickz, a new Clickbank competitor that burst out of the gate in early 2008 has been shut down for an indefinite period.

When you visit their site it says:

"Dear member, We are is currently down for maintenance. Please come back later. team@dclickz.com "

... and a quick search on Google resulted in this lawsuit dated from March 2008. Btw, the plaintiff for the lawsuit is a company called "Click Sales Inc." aka Clickbank...

Repeated emails to the company's business development manager for a status update on their Affiliate-Software-Review.com hosted affiliate network listing, which was never completed, have gone unanswered.

As an affiliate of DClickz, I've never received any emails from them giving reasons for their shutdown. 

My conclusion?

DClickz is having some serious issues and doesn't appear to be coming back to the affiliate network niche.

As for digital product marketing networks, I suggest you stick with Clickbank, PayDotCom, E-Junkie and Click2Sell.