A recent New Yorker had a story about Fred Franzia, the CEO/co-founder of Bronco Wine Company, the makers of the Charles Shaw wines you'll find at Trader Joe's and other places. To be honest, I'm not much a fan of the Charles Shaw wines; nor am I much a fan of Franzia, after reading the article.
However, I'm all for cheap wine: over the past couple of months, I've been drinking boxed wine pretty much exclusively (the NY Times approves, for environmental reasons).
Of the boxed wines I've tried, I like Bandit and Bota Box. Bandit makes a 1-liter TetraPak wine (as well as kid-size packages that remind me of the juice packages that I used to drink after soccer games) in a couple of varieties; I like the Cabernet best. Bota Box makes a 3-liter box (equivalent to 4 standard 750ml bottles of wine), again in a couple of varieties. I've had the Cabernet and the Merlot, and I like both.
As the New Yorker article puts it (and I'm paraphrasing, because I'm lazy), there are Sunday wines, and there are Wednesday wines, and there's a need for both. I just happen to really like Wednesdays.