Edit: Checked the forum if there is a thread about the bundle, but found nothing. Like Talin recommended you maybe should contact support if you are still interested in the pack.
Try these ones: http://www.telltalegames.com/forums/showthread.php?t=28792 http://www.telltalegames.com/forums/showthread.php?p=619221#post619221
It looks like a purchase of the bundle will entitle you to free backup / collector's DVDs if available, for the price of shipping and handling. Currently that would be five DVDs (one for each Sam & Max season, Strong Bad and Back to the Future).
I don't really like their activation system. For their older games they also offer the option of manual activation keys, so you don't need to be online with the computer you want to install the games on, but you're still dependent of Telltale and would have to ask for a new key each time you re-install a game on a new computer. Fortunately the DVD offers offset that shortsighted practice a little.
So from what I gather you'd get a DD bundle of 10 complete series for about 43 Euro (incl. VAT), and backup disks for half of them if you pay 8-20 Euros extras.
It might be worth it for Sam & Max alone, if you're a fan. Not sure about the other games; Puzzle Agent and Hector seem decent enough, Strong Bad is supposed to be okay, too, Back To The Future appears to be a matter of personal taste, and I don't expect much of Jurassic Park and Law and Order. I've got no opinion on The Walking Dead yet. I'd definitely get the bundle, if I had no other games to play. Considering my backlog I'll have to think about it some more though. I haven't even finished Sam & Max Season One yet, and if I'm honest to myself, my feelings somehow echo that of another poster in this thread who said that recent indie adventures like the WadjetEye's games (or even Time Gentlemen Please) are much more fun to play despite their less professional looks. Telltale's better adventure games are quite good, but by no means must plays, I think, not even for adventure fans.
Thanks for the links. I wouldn't say the Telltale games are not good as the last indie games, they are different because of the episode style. That allows you to finish one episode and come back later or play all episodes in a row. It really depends on how well they can keep a main story alive through all the episodes, which was fine for me in Monkey Island. The biggest risk is that not every episode is done in the same quality and so can ruin the whole experience, that's why I only would buy complete seasons.