We have five full time designers using Solidworks 2007, Mechanical Desktop was our primary design software until 2005. We also have 2 full time programmers running Cimatron who also do some designs in Cimatron when we get real busy, but for the most part we use it for programming cutter paths. We also have one full time person handling all our data translation using CATIA and various other design softwares who also does some programming, mostly with his outdated Solutions software. He has a third seat of Cimatron but refuses to learn a new software, but he's one of the bosses so I can't complain.
We looked at going all to Cimatron back in 2004 but the software was not the best for doing designs and it is expensive. All of our software is supported we just got Solidworks 2008 in the mail but we'll most likely wait until at least service pack 1.