I always deliver what I consider to be a finished photo, unless clearly instructed otherwise. Usually, but not always, 16Bit TIFF full resolution files, even when the image ends up printed in a 1"x2" space in a magazine page. I used to send on the Adobe RGB profile, but now I'm starting to send as Pro Photo, and no complaints this far. I'm warning them about the change in the profiling ( the DVD cover usually tells which specific settings were used ). I don't send them as CYMK, because I don't have, and don't want to, have this kind of control over the final printed output. They'll have specialized people with good knowhow, handle it on the other hand ( or they should ), and they'll be more than capable of converting better than I would right now.
But again, it depends on the client. If the client wants the RAW unprocessed files, I deliver DNG photos. I do my selection, and my basic Camera Raw adjustments, and sent the DNG files. Usually, the reason being "I have people here specialized on processing the way I need". Ok then, I won't give my camera output format, nor embed it, but it's a raw file.
Some clients complained that 16Bit TIFF files are too heavy and too big for them to work with, so, I just send 8Bit JPEG files.
All I all, I try to come to a middle ground between what the client needs, and what I consider to be a good quality for that. If not negotiated, I go for what I consider a standard format for me, 16Bit TIFF, with sharpening, a finished product, the image I had in mind when I pressed the shutter.