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ColdFusion: This is a viable solution for NT. It scales and performs reasonably well for probably all but the very high-end site. I would highly reccommend against using it on Solaris until their next release, supposedly due out this Fall. Reasoning? The code isn't actually ported over from Win32 -- it's running on top of Win32-like libraries (from Bristol) on Solaris, and performance ends up being similar to NT (bang for buck). The folks at Allaire are rewriting the entire code base to make it portable and more modular, and hopefully better performing. (Note: I used to work for Allaire, so I don't know if that matters at all in terms of what that means for this opinion.)Kiva/App Servers: I have to agree with Philip (sorry, I misspelled it earlier) on this one. They are typically more trouble than they are worth. Again, unless external forces dictate otherwise, stick with tried and true solutions like the ACS stuff, or ColdFusion (sorry...I just know it ...