To my knowledge, there is no solution for using a wireless 360 controller on the PC (and I've looked). The Play & Charge Kit does NOT work -- it will only charge the controller through the PC. Microsoft has a proprietary wireless standard for 360 accessories and does not sell a first-party adapter to enable this function, although they should. If anyone knows of a real solution and has actually gotten it to work for themselves, I would love to hear about it.
It was nice hearing your perspectives on Duels of the Planeswalkers, as I've been playing the PS Plus free version. As I said on RFN, it is a nice value for novice players and probably a great tutorial for learning how to play in an interactive environment. Magic Online is quite intimidating as a social experience and can become incredibly expensive, especially since the digital cards are easier to buy on impulse than physical packs. However, Mike's assertion about card redemption is not fully correct. You can only trade digital cards for physical (not both ways), and only as a complete set. Due to the random nature of digital card packs and the high resell value of most single cards, it is difficult and expensive to acquire a complete set of digital cards. Moreover, by the time you've done all that, you will be quite immersed in the world of Magic Online, for better or worse, and you may begin to question the value of having the physical cards. I think the redemption feature is rarely used, and by very hardcore collectors at that (because Wizards of the Coast will ship the set in mint condition). It has little relevancy for an active player of the game. In fact, I would argue that digital cards are overall a better value due to their versatility and fluidity -- you can have one card in multiple decks simultaneously, trade cards 24 hours a day in a thriving online after-market, and find opponents to test your decks or just play for fun within seconds.
As I noted on RFN, I can understand Duels of the Planeswalkers lacking a complete set of tools for deck-building from scratch, but it should at least allow you to modify and thin out the horrible built-in decks. The effectiveness of adding a powerful new card is quite low when you aren't allowed to pull out a comparatively weak card, and the more cards you add, the less likely you are to draw the ones you want/need. This produces the unintentional effect of decks potentially becoming weaker/slower throughout the campaign, even as you add more powerful cards that have been unlocked along the way. It is antithetical to basic deck-building principles and indeed to the very spirit of Magic the Gathering, which is why I found so little enjoyment in the console game.