I have seen several questions about how many computers Adobe Lightroom can be installed on for use with a single license. Below is a copy of the LR 2.0 License agreement and it appears that home users can use two copies – one desktop and one laptop. You can see this here: Lightroom 2.0 License Agreement. If I find out any different, I’ll post an update here.
Excerpt From Section 2 of the Lightroom 2.0 License
2.1 General Use. You may install and use one copy of the Software on up to the Permitted Number of your compatible Computers; or
2.2 Server Deployment. You may install the Permitted Number of copies of the Software on the Permitted Number of Computer file server(s) within your Internal Network for the purpose of downloading and installing the Software on up to the Permitted Number of Computers within the same Internal Network; or
2.3 Server Use. You may install the Permitted Number of copies of the Software on the Permitted Number of Computer file server(s) within your Internal Network only for use of the Software initiated by an individual through commands, data or instructions (e.g., scripts) from a Computer within the same Internal Network. The total number of users (not the concurrent number of users) permitted to use the Software on such Computer file server(s) may not exceed the Permitted Number. No other network installation or access (either directly or through commands, data or instructions) is permitted, including, but not limited to: (i) from or to a Computer not part of your Internal Network, (ii) for enabling web hosted workgroups or services available to the public, (iii) by any individual or entity to use, download, copy or otherwise benefit from the funtionality of the Software unless licensed to do so by Adobe, (iv) as a component of a system, workflow or service accessible by more than the Permitted Number of users, or (v) for operations not initiated by an individual user (e.g., high-volume automated server processing of wire feed content); and
2.4 Portable or Home Computer Use. Subject to the important restrictions set forth in Section 2.5 below, the primary user of the Computer on which the Software is installed (“Primary User”) may install a second copy of the Software for his or her exclusive use on either a portable Computer or a Computer located at his or her home, provided that the Software on the portable or home Computer is not used at the same time as the Software on the primary Computer. You may be required to contact Adobe in order to make a second copy.