"Elena Zannoni joined the conference in order to talk about the state of tracing on Linux. Several database geeks were surprised to find out that SystemTap was not going to be included in the Linux kernel"
I wish people were not mislead into thinking that this ("inclusion in the linux kernel") was at all necessary to use systemtap.
"and that there was no expected schedule for release of utrace/uprobes"
I assume "merge" rather than "release". Yes, utrace and/or uprobes in the kernel would make this stuff more useful to database hackers on non-RH platforms.