(In?)Famous photographer Thomas Hawk has put up his response to Mozy Dropping Their Unlimited $4.95/Month Backup Plan. $4.95 is a good price to backup unlimited data from your local computer (no NAS or SAN attachments, local disks only), and it seems that Mozy has realized they can charge more and are dropping the plan, without grandfathering those who are in it in for longer than March 2011.
Mozy's new prices are 50G at $5.99/month for 1 computer, or 125G for $10/month for 3 computers. Not bad in the grand scheme of things, but for photographers who shoot RAW..... well, lets just say with the $10/month plan I can back up 2009 and 2010 of my archives, or years 2003 to 2007, but not all my archives (314G) much less those plus my actual computer files.
Thomas links to more details over at CNET, and recommends BackBlaze as an alternate (who is giving a 10% discount to Mozy refugees) at $5/month. I've also heard all about Carbonite through the tons of advertising on TWiT, and they also offer a similar unlimited plan for $54/year ($4.50/month).
Hopefully the other online backup places won't follow suit. Personally I recommend flocking from Mozy to someplace that provides an all you can eat backup solution to show them that this is a service that people want, and are willing to pay for, not be nickled and dimed in a day and age where Terabyte drives are the norm.