Our company is using eclipse since several years now (we are using WTP since release 0.7)
I am currently evaluating eclipse 3.6.2 with WTP 3.2.3 which s
Couldn't comment so I will just put my comment in to this answer.
Have you tried upping Eclipse's memory allocation, I know it used to crash all the time when I used it on Mac OS X awhile ago. There is a config file that has the base RAM allocation in it, once I modified that file and gave it an extra 128 megabytes of memory it behaved better. Not sure if this will affect WTP, I am commenting more in regards to the core Eclipse application itself.