I haven't looked too much at the tags in use, but noticed an inconsistency in the currency tags for this question -- 'usd' and 'british-pound'. I thought I'd create a meta question to discuss.
It looks like the tags have already been edited. What are your suggested changes?
Any user with 200+ reputation can edit tags. Since you do not yet have sufficient reputation, you can make your requests here (as you did) or comment on the individual posts.
Currencies have standard names (usd, gbp, etc.) so maybe standardize on them and alias other names ("us-dollar", "british-pound", "uk-pound") to them?