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Seo Ultimate - Your standard title tag, meta descriptions, custom meta fields, etc. They put a footer link at the end of your site, but you can take it out if you wish.

Efficient Related Posts - Place related posts at the end of your articles.

I use SubmitEaze, and they just recently upgraded their software to include a captcha solver (since many directories use the same platform). The software is good at getting you into directories - whether those directories actually add any value is up for debate. Generally the directories are mediocre to low quality, so chances are your listings won't get indexed for a long time.

So far, I haven't seen sites get "in trouble" for low quality directory listings. At the same end, I haven't seen sites increase their organic rankings from low quality directories either. There might be a case for using directories for local search, since Google Places generally looks for a citation as opposed to a backlink (and Google Places is all about quantity as opposed to quality. )