Flow-tools version .67 ebuild adding support for mysql and pgsql. This version is not considered stable by the flow-tools developers.
Created attachment 27751 [details] flow-tools-0.67.ebuild
If it's not concidered stable by the developers I rather not see it in portage. Once it has been declared stable by upstream (ie: you can expect some kind of support for it) I will re-concider adding it to the portage tree.