Gigablast is still up and running, but the submit page has been disabled for years. Some SEO's still list Gigablast among the sites they submit too. Does anyone know a way to get a site listing into Gigablast?
Sorry that I can't help, but I will tell you this -- I have a script installed at all my sites that lists any bots that crawl my pages, and your posting made me wonder when did Gigabot visit. On my older sites I found a fair amount of indexing in 2006, with some indexing continuing each year up to Jan 09. Nothing since then, so they may have maxxed out.
About once a year I go on a search and submit mission to make sure my sites are listed and stumbled over Gigablast. Used to be back door methods like Inktomie to get into secondary listings. Oh well, another one bites the dust, filed next to my go guide and zeal memberships.