I'm also looking for an alternative oscillator. Something that can go higher than 33MHz.
linear do another LTC that runs at higher frequencies. Its on the linear site, but i can't remember what it is.
LTC6905. 17 MHz to 170 MHz, the 1799 is 1 KHz to 33 MHz. Figured that one out with Getlofi, I use his 1799s since I'm stateside. Put a 1799 in a little toddler-friendly mp3 player, guess I fucked up the original crystal so I couldn't make it switchable, so I'm stuck with it playing the songs slow all the time, and since USB is clocked at 48MHz, I can't swap out the files either. He was going to do up a couple on his boards for me, but that was like probably a year ago now, I should really touch base with him, the ball is probably in my court.
As far as CV on an LTC1799, the vtl5c3 I've got rigged up to my re-clocked Yamaha REX-50 is lots of fun with a sequencer. The response time I'm sure isn't what a lot of people would hope, hella glide on that, but it can still do some wacky shit.