It is very highly recommended to book a hotel for the period of your attendance of CIA 2006 in Edinburgh as soon as possible!
The national e-Science institute eSI offers you its unique reservation service in terms of sending you an individual proposal of booking one hotel selected by eSI for a special eSI rate for you in due course of your registration to the event on line here.
If you want to do the booking yourself, the following list of subjectively selected hotels could serve you as a first aid in this matter. Each of these hotels is located in the city centre. Please note that, as usual, for some hotels, their availability and rates provided at the respective web page on line may differ significantly from those provided on request via phone, or e-mail.
There are, of course, many other differently rated hotels and B&B guesthouses available in Edinburgh. You may want to use e.g. tripadvisor for searching.