Nothing wrong with not using the tripod on those shots, db...full sun will bring the shutter speed up so high that blur & shake are non-factors...the big advantage to using a 'pod I've found is that digicams are typically so small & light that just pushing the shutter button will move the cam & undo all the work you just spent framing the shot just so...fortunately, the software that comes with most cams will let you fix most cropping issues, but it's still a piss-off when you see that you just cropped off the focal point of your shot...
Of course the best thing about digital is that it costs no more to take a dozen or so safety shots just to make sure...

BTW, those are some great flower shots, you're already macro-ing like a pro...

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