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Didn't know about Weaverslave - looks quite capable.
I have not yet found Eclipse usable, due to its Java nature of having a project somewhere fixed where you build new stuff. I like to be able to have my PHP code anywhere I want and load it into a project without the files moving around.
It may be that Eclipse supports that, but I haven't figured it out yet.
My own preference is Zend Studio - it is expensive, but an awesome tool with many functions such as direct FTP and SQL browsing. It also has CVS and SVN integrated, although I have yet to get that working properly.
"When you can flatten entire cities at a whim, a tendency towards quiet reflection and seeing-things-from-the-other-fellow's-point-of-view is seldom necessary."
Cusix Software