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We're certainly working on crawling more and more deeply I'd say we'll have between 35-75% of the links that Google knows about (depending on where you're getting your links from - if it's low quality stuff, especially deep pages on spammyish pages, it's less likely). In terms of delay in picking up new links - if you got a link today, it would likely be in the Jan. 4th index (because we're actively crawling for that index and haven't started processing). However, it's also possible that we've already crawled that part of the web in the last week or two and it wouldn't be until the next index (late January/early February). Thus, anywhere from 20 (at the very fastest) to 60 days (at the very worst) is the speed of OSE's pickup of links.

Unfortunately at this time it is not possible to view historic Domain Authority metrics. There are a couple of reasons for this, including the prohibitive cost of maintaining older indexes (my understanding is they are extremely large and to maintain/store/serve.)This may change in the future, but right now there is no access to historic indexes. The other reason is that metrics like Domain Authority are comparative metrics that change from index to index. This means that it's best to use these numbers to compare yourself to the competition, but not to your own previous metrics as the base calculations can change. DA measures relative strength - so it's completely possible to improve 10% by raw numbers, but if your competition improved 10% as well, your relative DA really didn't change. For this reason we caution against folks measuring DA over time, and instead using it as indicator of ranking potential in real time against other competitors. That said, SEOmoz does offer a Historic PageRank checker that does work for many domains. It's kinda fun.