They may be redundant, but I'd hold on to them. Especially mobisingles.mobi. An awful lot of mobi____ type names were regged during and before landrush. I have some myself, and even bought an aftermarket one on Sedo. There has been a lot of discussion on there being a mobi default button on mobile devices, and that coupled with the possibility of 'mobi' being a 'slang term' for mobile devices and surfing, could prove to work in the favor of these type of names. My Blackjack phone now adds '.com' on the end of new address type ins currently, so I can see that being rethought out, as Samsung is a mtld partner. No one knows if any of this will or won't frutate in the future, and what will or won't work or go with the mobile internet experience, so I'd say wait and see with them.