Choline comes in various forms from various places for health reasons, etc.

If you look at its structure http://en.wikipedia.org/wiki/Choline

Choline hydroxide is one of the class of phase transfer catalysts which are used to carry the hydroxide  ion into organic systems, and because of this it is considered a strong base. It is the least costly phase transfer catalyst, and is used as a cheap method of stripping photoresists in circuit boards. Choline hydroxide is not completely stable and it slowly breaks down into trimethylamine.[citation needed]

I am thinking the addition of a strong base to the hydroxide will release trimethylamine - I did just that in a test tube, but only got a very slight smell of something fishy, and it looks as though also a gas of generated that could be ignited - however, I used a lighter to test this and possibly it could have been the butane giving a false positive of a flammable gas.

Anyone have any input on this? Not to sure if trimethylamine is of any use, but it has some properties that might make it useful.

Thought I would at least mention this...

http://en.wikipedia.org/wiki/Trimethylglycine
Nice! It is essentially the same, however the instead of being an alcohol, it is an acid.

What is the increased usefulness in triethylamine vs trimethylamine? Just boiling point?
What is its primary use?

I assume metaldehyde would produce the triethylamine variant?

What you're doing to choline is basically a hofmann elimination. The resulting ethenol tautomerizes to acetaldehyde, generating two useful things from choline. So, the catalyst you're looking for is silver oxide.

Awesome! Would a similar oxide work as well, such as copper oxide?

No idea. Silver chemistry is weird and awesome (see also Hunsdiecker reaction and adrenochrome). Silver (I) is a much stronger oxidising agent than copper (I), though, so you're probably going to want the real deal.

The good news is that silver nitrate is cheap, and it reacts with aqueous NaOH to form AgO.

EDIT: One obvious use for trimethylamine: its N-oxide reacts with acetic anhydride in a Polonovski reaction to form dimethylacetamide and formaldehyde. Dimethylacetamide is pretty awesome, I'd say, and choline is as OTC as table salt.