Now that the buff insanity of 3.0 is a bit in check at least, it'll be a little harder to make a good fighting wizard.
I guess, like Frank hinted,
Polymorph is still a key spell to get good fighting abilities. You don't need to go unarmed, tho, as there are enough badass monsters (like troll, some giants) which can use weapons just fine.
In 3.0 one of my preferred characters was an elven rogue/wizard/arcane trickster archer (an incredibly cool character to play, played her from level 1 through 19!

). She could handle herself in combat just fine (and with enough time to buff up (including limited wishing for persistant divine favor

) could get to insane levels, much like clerics), but I'm not sure how the many changes to archery have this work out now.
Because of the lower duration of many spells, I suppose, that the sorcerer is now actually the better choice here, because you have plenty spells to rebuff over the course of a day.
I don't think I'd bother with fighter levels, elves get some fine weapon proficiencies and armor isn't really needed, if you can be mirror imaged, blinking, displaced and greater invisible, as well as stone skinned and whatnot.
Bye
Thanee