In node v0.6 was added zlib module to works with data compression, so node-compress is now unneeded.
Remove info about node-compress from README-file
replace node-compress module with built-in zlib
I've replaced this sting with this, because objects, which returns by zlib.createUnzip don't have setEncoding method by some reasones.
Also note, that function mime.charsets.lookup passes two arguments, where second is a default charset.
This function returns default charset for all mimes, which don't passes ^text/ regexp, for all other mimes it returns UTF-8.
And if you used setEncoding to change encoding of incoming data from something like windows-1250, or koi8-u, then you should know, that this function and toString can't handle that kind of encodings. Also, here you deletes information about encodings.