Good Hackintosh tutorials for Mac OS X 10.7 "Lion" include:
Install OS X 10.7 Lion via Download - The quintessential tutorial to install the download version of Mac OS X 10.7 "Lion" on a PC with compatible hardware using the xMove and Multibeast tools from the legendary tonymacx86. The same site also covers upgrading a Hackintosh to OS X Lion 10.7.1.
Install OS X 10.7 Lion via Thumb Drive - A simple tutorial to install OS X Lion from the retail Apple USB thumb drive on a Hackintosh, also from tonymacx86.
Buying Lion on a Hackintosh - A short, but vital, post on upgrading a Mac OS X 10.6 "Snow Leopard" Hackintosh to Mac OS X 10.7 "Lion" via the App Store from the always excellent Bassheadtech.
Always Up-to-Date Hackintosh Guide - A noble effort to write an "always up-to-date" guide to building a Hackintosh from Lifehacker. Covers hardware selection and construction as well as installing OS X Snow Leopard and Lion.
Note that Mac OS X 10.7 "Lion" does not support "Rosetta" and cannot run older Mac OS X software written for the PowerPC processor. Those who need older software should instead consider Mac OS X 10.6 "Snow Leopard."