I've mentioned ChessVibes Openings before as a product for serious students of the first phase of the game*, and since this week's issue was especially good, I thought I'd mention it again. The authors of this weekly newletter (which gets emailed to you with a PDF and PGN file) are IMs Merjin van Delft and Robert Riis and the cost is 25 Euros/year. More info, including a sample issue, can be found here.
* This is a class that probably shouldn't include anyone not already near 2000 or playing serious correspondence/email chess. On the other hand, if you're 1100 and studying the opening is what gives you the most pleasure in chess, then go for it!