Roger Waters issued a statement:
I was very sad to hear of Rick's premature death, I knew he had been ill, but the end came suddenly and shockingly. My thoughts are with his family, particularly [his children] Jamie and Gala and their mum Juliet, who I knew very well in the old days, and always liked very much and greatly admired. As for the man and his work, it is hard to overstate the importance of his musical voice in the Pink Floyd of the '60s and '70s. The intriguing, jazz influenced, modulations and voicings so familiar in 'Us and Them' and 'Great Gig in the Sky,' which lent those compositions both their extraordinary humanity and their majesty, are omnipresent in all the collaborative work the four of us did in those times. Rick's ear for harmonic progression was our bedrock. I am very grateful for the opportunity that Live 8 afforded me to engage with him and David [Gilmour] and Nick [Mason] that one last time. I wish there had been more.
Pink Floyd drummer Nick Mason told Entertainment Weekly:
Like any band, you can never quite quantify who does what. But Pink Floyd wouldn’t have been Pink Floyd if [we] hadn’t had Rick. I think there’s a feeling now -- particularly after all the warfare that went on with Roger and David trying to make clear what their contribution was -- that perhaps Rick rather got pushed into the background. Because the sound of Pink Floyd is more than the guitar, bass, and drum thing. Rick was the sound that knitted it all together... He was by far the quietest of the band, right from day one. And, I think, probably harder to get to know than the rest of us... It's almost that George Harrison thing. You sort of forget that they did a lot more than perhaps they’re given credit for.
thank you