This can be a great way of getting cheap and highly targeted traffic to your website within a few days of signing up. Since you only pay for actual clicks to your site, it is a very good deal. Goto - This is the PPC engine with the most visitors and most search requests. A top listing on Goto is also a top listing on Altavista as well as other important engines. Prices are high in some very competitive industries so focus on bidding reasonably on many keywords instead of just a few.
Bid prices are more reasonable here.
FindWhat - Has recently established a partnership with Excite. Prices are reasonable and top listings here can help your listings on Excite. This should be your first stop when deciding which PPC engines to use in your promotion plan.