I don't see where you are getting this from. The current instructions clearly state:
Line 1 Instructions:
b. Sole proprietor or single-member LLC. Enter your individual name as shown on your 1040/1040A/1040EZ on line 1. You may enter your business, trade, or “doing business as” (DBA) name on line 2.
Part I. TIN instructions:
If you are a single-member LLC that is disregarded as an entity separate from its owner, enter the owner’s SSN (or EIN, if the owner has one). Do not enter the disregarded entity’s EIN. If the LLC is classified as a corporation or partnership, enter the entity’s EIN.
The section that says "or EIN, if the owner has one" will not apply to an individual US citizen who has an SSN.
I would certainly like to use the LLC's TIN for tax purposes, but I haven't yet seen how to avoid giving the SSN on a W-9.
