The flash based Archos 5 players feature a memory expansion slot so you could pop an SDHC card into the player to bulk up the on board memoryif you used it all up.
I believe that Archos have been previously asked this and if my memory serves using 3G dongles will not work with these players. However, you may wish to give them a call on 02380 711 779 for confirmation.
I've been waiting for mine since 15 of January and yesterday I saw that was already in stock but my order didint updated and was still waiting stock so I wrote a e-mail asking the situation. Today nobody answered and I wrote another to the person I've talked to make the order and no answer till now. I now is weekend and they've putted again out of stock and my order is still waiting :( And they dont even answer my e-mails or the live chat. Anyone knows what is happening?
Please note that emails (x that yours has come in without any problems) can take up to 24 hours to answer; and if you emailing on a Friday this is normally extended until we re-open after the weekend.
However, we did not receive enough Archos players to fill all of the back orders; which is why the website showed them as being in stock briefly while the earliest back orders were sent.
More of these players are expected soon; although Archos are yet to provide an arrival date to the accounts team.