I've played quite a few bards since 3.0 came out, and I've learned a few things that may help you out a little.
Some sample bard character ideas
The Sage: Bard focused on information gathering and skill knowledge. Divinations and bardic knowledge are your big strengths. Consider Loremaster later on.
The Skald: Barbarian/Bard, As Patryn said, nothing ruins a day like a raging, singing madman.
The Warrior/Mage, Bard, or Fighter/Bard. Concentrate on support abilities, whether it's having cure spells to dispense as you move about the battlefield, using buffing spells as needed on yourself or the party, or just using inspire courage and flanking opponents to help your frontline bring them down. A nifty prestige class for this idea is Mindspy (Complete Warrior).
The General: Bard/Marshal, With a combination of the marshal's aura ability and the bard's inspire courage/heroism abilities, you will be a great support character. (However as my wife often reminds me, not everyone enjoys the support role. In which case, bard may not be your best choice of class.)
The Social Butterfly: Bard, Here you want to focus all your skills into social applications, tailor your spell selections toward the espionage/socializing direction. Spymaster is a nifty prestige class for this character type.
Feats I've found useful.
All of these inspire fear in opponents for various amounts of time. Also the saves are all charisma based, making them very useful for bards.
Daunting Presence (Libris Mortis/Miniatures Handbook)
Kiai Shout (Complete Warrior)
Greater Kiai Shout
Frightful Presence (Draconomicon)
These make your bard useful in various situations
Master Linguist (Races of Eberron)
This feat lets you learn a new language every level for free. It requires you to speak 4 languages to take it.
Obscure Lore (Complete Adventurer)
Gives you a bonus on Bardic Knowledge checks. Always useful.
Combat Intuition (Complete Adventurer)
Also a nifty feat for bards.
Ability Focus (Monster Manual)
This can be useful when applied to the fascinate, suggestion, or mass suggestion abilities.
Lingering Song (Complete Adventurer)
This makes some bardic abilities last twice as long after you stop concentrating on them.
Various Bardic Music Expansion Feats (Lots of Books!)
There are a bunch of feats out there that add new uses to your bardic music, or allows your music to affect different creatures. (Like undead, or plants)
Battle Dance (Epic)
I don't remember where exactly this came from, but it allows you to add your charisma bonus to your attacks, reflex saves, and armor class.
Anyways that's all I can think of at the moment.
Hope that helps you.