Originally Posted by Gaucho100K
Oh... so it turns out I have a rubber/plastic laptop...??!!!!

It might make you feel a bit better to know that most ThinkPads are a titanium composite, carbon-fibre reinforced plastic. IBM says it's three times stronger than ABS plastic, while being lighter weight.
Here's IBM's advice for cleaning the case:
Originally Posted by Access IBM
Cleaning the cover of your computer
Occasionally clean your computer as follows:
Prepare a mixture of a gentle kitchen-use detergent (one that does not contain abrasive powder or strong chemicals such as acid or alkaline). Use 5 parts water to 1 part detergent.
Absorb the diluted detergent into a sponge.
Squeeze excess liquid from the sponge.
Wipe the cover with the sponge, using a circular motion and taking care not to let any excess liquid drip.
Wipe the surface to remove the detergent.
Rinse the sponge with clean running water.
Wipe the cover with the clean sponge.
Wipe the surface again with a dry, soft lint-free cloth.
Wait for the surface to dry completely and remove any fibers from the cloth.
And since you mentioned the keyboard....
Originally Posted by Access IBM
Cleaning your computer keyboard
Absorb some isopropyl rubbing alcohol on a soft, dust-free cloth.
Wipe the keytop surface with the cloth, ensuring no liquid drips on or between the keys.
Allow to dry.
You can use compressed air to remove any crumbs and dust from beneath the keys.