Dwarf Cannon Crew reads:

Forced: After this unit enters play, search the top five cards of your deck for a support card with cost 2 or lower and put it into this zone, if able. Then shuffle your deck.

So the FAQ reads:

"“Put into play” means that the card enters
play through a card effect instead of
through normal costs and restrictions. An
important distinction is that put into play
does not bypass the unique restriction or
any restrictions in the text box of the card."

I'm a little unclear about its effects on limited cards. If I played a limited card earlier that turn, can I pull out another limited card with DCC?

"Limited

A player may play only one card with the Limited
keyword each turn." (p. 16)

FAQ clarifies "play" as from hand, paying costs, etc. So I'd say DCC skips Limited limitation.

Dam is correct. The Limited keyword only comes into play when you are trying to play it from hand.

I actually e-mailed that one to James several weeks ago, as I found the wording in the FAQ confusing as well (seemed to be possibly "bypassing a play restriction" with the DCC, even though you weren't "playing" the card). But, yeah, Dam and dormouse are correct. You can also play another Limited card from hand after flipping one with DCC.

Thanks guys for the quick responces.