Welcome Steve. I will likely be following some stages in Morocco.
There will be a Euromaster (tyre people) trade stand in Lisbon and they will have fairly detailed maps of the route, see if you can get some!
For the benefit of those who might not be aware, the overnight stops for the rally are constrained to airports that can take the number of planes involved. Nevertheless the 2008 route is quite different from previous years.
Euromilhões Lisboa Dakar: 2008 Route
The early part of the route follows the last couple of years' routes - Lisbon > Málaga > Nador > Er Rachidia > Ouarzazate. Then it changes quite a lot by going to Guelmim rather than Tan Tan. Then Smara and into Mauritania where voyeurs can't follow through the sand berm. After a stop in Atar it goes south west to Nouakchott, then
north to Nouadhibou which conveniently allows slow moving spectators to catch up. Then east back to Atar again following the railway before heading south to Kiffa then Dakar.
Potential viewing points
Each day starts with a non-racing liaison to the start of the special stage. Then the special stage which is the actual racing bit. At the end of the special stage there will then be another liaison to the overnight bivouac. Unless you have advance knowledge of the exact route, it's difficult to intercept the end of the day's special, so the points listed below are where the next day's special starts relatively close to the previous night's bivouac.
5 Jan: special stage starts 104km south of Lisbon
8 Jan: special stage starts 29km south of Er Rachidia
10 Jan: special stage along the beach 66km south west of Guelmim
15 Jan: special stage starts 111km east of Nouhadibou
When we visited Lisbon for the 2006 rally we didn't bother to watch the start which would have been very crowded, but intercepted the bikes on the motorway south of Lisbon and watched the special stage. You then need to get your skates on if you are going to intercept the rally in Morocco, so get down to Algeciras/Tarifa, cross to Tanger then south down the coastal motorway to Rabat, motorway east to Meknes, then main road via Midelt to Er Rachidia.
Hotels in cities close to the overnight stops are normally fully booked, so rather than stay in
Er Rachidia, the last two years I overnighted near Erfoud (to the south) which is also more convenient for the morning start. Although
Ouarzazate is listed as a stop, Zagora looks a better bet for being able to see the rally--check out the route detail for Morocco.