I resubmit my pledge of 100 BTC.
I absolutely positively want more scrutiny of both bitcoin's source code and the underlying cryptographic concepts.
However, I don't think offering a token amount of money (even in the form of bitcoins) is appropriate.
A real, professional security review of bitcoin would take a lot of time and a lot of money. I understand that's not what is being asked, but asking Mr. Schneier to write about bitcoin is really an irrational "Appeal to Authority" -- I think he'd say that any cryptography-related technology is never proven secure, but only gains trust by having multiple people and groups of people look at it, imagine potential attacks, try to attack it, etc.
Or, in other words, if he writes an article about bitcoin now I think the summary would be "interesting new technology, doesn't appear to be a scam, worth keeping an eye on." I think he'll write that article soon without any prompting from "the bitcoin community," just given the level of buzz bitcoin is generating the last month or two. I don't think a few hundred bitcoins will motivate him to write the article any sooner.
The value this has to me is furthering the scientific (applied mathematics) foundation of this concept. Strengthening that will go along way in increasing the value of the bitcoins I posses (this is largely a selfish matter, but one I believe we have in common).
I understand the cost in USD to do an solid security assessment of the code base (I do this for a living), but my approach to appealing to Mr. Schneier is rooted in that he has to write interesting content all of the time to stay relevant. I believe this is right up his alley.
By offering bitcoins we give Mr. Schneier something to play with during the course of his his analysis, and it has the added benefit of the community taking part in a transaction of value.
Having allies in places Mr. Schneier frequents can only increase the value my bitcoins have.