I have a couple of people who I see on a regular bases, but I seem to be missing their addresses all of a sudden

It would be just as easy for me to hand deliver them an invitation as it would for me to verify their address (which I will do regardless for thank yous and such.) Is it alright to hand deliver a formal invitation?
Re: distributing invitations
I would mail it.
If you hand deliver it, you run the risk of some random person seeing you deliver it and asking "where's mine?"
here i am again with the non-ettiquete version of a traditional wedding detail......
we are not doing paper invitations for the majority of our guests. we are using our wedding website for invitation purposes including all wedding related details, and RSVP. only family and bridal party and a few select close friends will receive hand made invitations (which will reference the website also), meant as more of a keepsake for those who i know would love it.
i KNOW this goes right at the top of the list of what not to do, but we decided early on that we would rather spend our money on the venue, free rooms for out of state family, food music and drinks.
i have not seen anyone on here yet with a similar idea and i wonder if anyone has done this but is not willing to admit it!
comments? thanks!
Another set of friends did a very basic card printed on regular printer paper as invitations. It only cost them about $5 (not including postage) to do all the invites and envelopes. I much preferred that over only having a website to reference.
I'm begging you: send paper invites!