I've been finding that Scrapebox is starting to be more effective in tiered linking, where you build high quality blog posts, web 2.0s or social bookmarks to that link to your money site and then use Scrapebox to add some linkjuice to those sites.
It's generally safer that way, as when Google does a manual review they will see mostly high quality backlinks, and if in a future Google update, it really deemphasizes blog comments (which I think will happen eventually), my money sites will be relatively unaffected.